Impala statistics 1992-2023
Table 1a
	Number of participants	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
	Foreign Document Suppliers	0	1	3	4	4	5	5	5	5	5	5	5	5	5	5	4	3	3	3	3	3	3	3	3	4	2	2	2	1	1	0	0
	Requesting Libraries	0	4	17	36	44	48	56	73	74	77	94	101	102	91	91	101	106	118	129	129	138	138	101	104	101	106	107	104	104	94	69	72
	Requesting and Supplying Libraries	25	25	35	47	49	56	61	64	98	420	424	452	454	477	494	496	497	495	488	488	501	498	484	485	476	480	473	470	465	465	450	446
	Fax/E-mail Libraries	0	0	53	60	64	124	124	124	109	109	104	91	83	72	69	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
	Total	25	30	108	147	161	233	246	266	286	611	627	649	644	645	659	601	606	616	620	620	642	639	588	592	581	588	582	576	570	560	519	518
	Increase 2001: participation of Flemish public libraries
Table 1b
	Number of participants	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
	Corporate libraries	-	-	-	-	-	-	-	-	-	-	-	48	46	46	45	49	51	51	51	51	58	60	39	39	40	40	41	39	39	30	25	25
	Documentation centers/special libraries												18	18	33	34	23	24	30	33	33	34	32	30	34	34	37	38	36	35	35	23	21
	Governmental libraries												35	34	29	37	37	38	39	40	40	48	50	45	45	42	42	43	43	44	42	35	30
	Public libraries												319	319	329	332	331	332	333	329	329	328	328	322	315	316	319	319	317	317	316	312	310
	Schools higher education												99	100	98	99	78	79	83	85	85	87	80	70	74	63	62	60	60	59	59	54	60
	University libraries												60	60	52	58	58	59	59	60	60	62	64	59	61	60	64	58	58	55	57	53	52
	Other scientific libraries (incl. EHC and KBR)												43	42	34	30	19	18	18	19	19	22	22	20	21	22	22	21	21	20	20	17	20
	Foreign document suppliers (online + fax)	-	-	-	-	-	-	-	-	-	-	-	27	25	24	24	6	5	3	3	3	3	3	3	3	4	2	2	2	1	1	0	0
	Total	0	0	0	0	0	0	0	0	0	0	0	649	644	645	659	601	606	616	620	620	642	639	588	592	581	588	582	576	570	560	519	518
Table 2
	Number of requests submitted - All requests	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
Articles
	Fail	702	1.740	3.977	7.436	9.486	9.193	9.297	11.161	11.927	12.077	9.619	8.277	8.121	5.937	5.640	5.824	5.945	5.698	5.969	6.814	7.059	5.547	5.124	4.354	3.402	2.690	2.518	2.153	1.898	1.430	1.234	1.130
	Success	4.461	13.950	36.106	65.688	81.603	98.609	105.032	136.218	137.884	128.075	95.327	76.722	63.264	43.821	45.877	41.589	45.294	44.540	40.709	39.717	36.645	29.486	28.918	26.118	23.398	19.998	15.758	13.041	10.360	8.674	8.139	8.084
	Total	5.163	15.690	40.083	73.124	91.089	107.802	114.329	147.379	149.811	140.152	104.946	84.999	71.385	49.758	51.517	47.413	51.239	50.238	46.678	46.531	43.704	35.033	34.042	30.472	26.800	22.688	18.276	15.194	12.258	10.104	9.373	9.214
	Articles Success Ratio	86,4%	88,9%	90,1%	89,8%	89,6%	91,5%	91,9%	92,4%	92,0%	91,4%	90,8%	90,3%	88,6%	88,1%	89,1%	87,7%	88,4%	88,7%	87,2%	85,4%	83,8%	84,2%	84,9%	85,7%	87,3%	88,1%	86,2%	85,8%	84,5%	85,8%	86,8%	87,7%
Monographs
	Fail	1.147	1.505	3.044	4.285	4.443	5.753	6.394	7.254	7.685	9.824	11.547	11.575	13.865	13.490	13.837	14.118	13.518	14.617	13.795	15.084	14.591	15.436	15.263	14.823	13.442	11.040	11.263	10.726	8.496	7.578	4.080	1.486
	Success	3.953	4.900	7.918	10.668	10.483	16.759	17.451	19.825	20.090	24.371	36.062	38.446	47.989	49.283	58.400	63.535	72.813	77.071	78.958	90.195	94.550	95.984	93.215	91.495	80.649	76.439	76.567	71.981	49.062	51.965	25.522	9.482
	Total	5.100	6.405	10.962	14.953	14.926	22.512	23.845	27.079	27.775	34.195	47.609	50.021	61.854	62.773	72.237	77.653	86.331	91.688	92.753	105.279	109.141	111.420	108.478	106.318	94.091	87.479	87.830	82.707	57.558	59.543	29.602	10.968
	Monographs Success Ratio	77,5%	76,5%	72,2%	71,3%	70,2%	74,4%	73,2%	73,2%	72,3%	71,3%	75,7%	76,9%	77,6%	78,5%	80,8%	81,8%	84,3%	84,1%	85,1%	85,7%	86,6%	86,1%	85,9%	86,1%	85,7%	87,4%	87,2%	87,0%	85,2%	87,3%	86,2%	86,5%
Total
	Fail	1.849	3.245	7.021	11.721	13.929	14.946	15.691	18.415	19.612	21.901	21.166	19.852	21.986	19.427	19.477	19.942	19.463	20.315	19.764	21.898	21.650	20.983	20.387	19.177	16.844	13.730	13.781	12.879	10.394	9.008	5.314	2.616
	Success	8.414	18.850	44.024	76.356	92.086	115.368	122.483	156.043	157.974	152.446	131.389	115.168	111.253	93.104	104.277	105.124	118.107	121.611	119.667	129.912	131.195	125.470	122.133	117.613	104.047	96.437	92.325	85.022	59.422	60.639	33.661	17.566
	Total	10.263	22.095	51.045	88.077	106.015	130.314	138.174	174.458	177.586	174.347	152.555	135.020	133.239	112.531	123.754	125.066	137.570	141.926	139.431	151.810	152.845	146.453	142.520	136.790	120.891	110.167	106.106	97.901	69.816	69.647	38.975	20.182
	Overall Success Ratio	82,0%	85,3%	86,2%	86,7%	86,9%	88,5%	88,6%	89,4%	89,0%	87,4%	86,1%	85,3%	83,5%	82,7%	84,3%	84,1%	85,9%	85,7%	85,8%	85,6%	85,8%	85,7%	85,7%	86,0%	86,1%	87,5%	87,0%	86,8%	85,1%	87,1%	86,4%	87,0%
	% Articles on Total	50,3%	71,0%	78,5%	83,0%	85,9%	82,7%	82,7%	84,5%	84,4%	80,4%	68,8%	63,0%	53,6%	44,2%	41,6%	37,9%	37,2%	35,4%	33,5%	30,7%	28,6%	23,9%	23,9%	22,3%	22,2%	20,6%	17,2%	15,5%	17,6%	14,5%	24,0%	45,7%
Table 3
	Number of requests submitted to Foreign Document Suppliers	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
Articles
	Fail	-	356	2.021	4.928	6.359	8.216	7.906	8.011	8.126	7.850	6.037	4.929	4.425	2.093	1.962	2.156	1.479	1.242	1.232	805	485	439	296	231	216	124	137	41	0	0	-	-
	Success	-	1.474	8.699	15.212	18.418	23.810	23.092	31.719	31.366	30.814	22.561	16.623	13.900	8.492	9.338	7.861	7.386	4.862	3.700	1.890	888	795	459	421	387	271	266	56	0	0	-	-
	Total	-	1.830	10.720	20.140	24.777	32.026	30.998	39.730	39.492	38.664	28.598	21.552	18.325	10.585	11.300	10.017	8.865	6.104	4.932	2.695	1.373	1.234	755	652	603	395	403	97	0	0	-	-
	Articles Success Ratio	-	80,5%	81,1%	75,5%	74,3%	74,3%	74,5%	79,8%	79,4%	79,7%	78,9%	77,1%	75,9%	80,2%	82,6%	78,5%	83,3%	79,7%	75,0%	70,1%	64,7%	64,4%	60,8%	64,6%	64,2%	68,6%	66,0%	57,7%	0,0%	0,0%	-	-
Monographs
	Fail	-	191	598	1.133	1.436	1.303	1.420	1.350	1.417	1.378	1.136	964	748	873	712	598	366	301	361	214	27	16	13	9	22	15	10	2	0	0	-	-
	Success	-	129	481	662	798	1.041	823	947	843	864	834	816	574	641	419	368	311	479	217	144	21	12	11	8	10	12	6	3	0	0	-	-
	Total	-	320	1.079	1.795	2.234	2.344	2.243	2.297	2.260	2.242	1.970	1.780	1.322	1.514	1.131	966	677	780	578	358	48	28	24	17	32	27	16	5	0	0	-	-
	Monographs Success Ratio	-	40,3%	44,6%	36,9%	35,7%	44,4%	36,7%	41,2%	37,3%	38,5%	42,3%	45,8%	43,4%	42,3%	37,0%	38,1%	45,9%	61,4%	37,5%	40,2%	43,8%	42,9%	45,8%	47,1%	31,3%	44,4%	37,5%	60,0%	0,0%	0,0%	-	-
Total
	Fail	-	547	2.619	6.061	7.795	9.519	9.326	9.361	9.543	9.228	7.173	5.893	5.173	2.966	2.674	2.754	1.845	1.543	1.593	1.019	512	455	309	240	238	139	147	43	0	0	-	-
	Success	-	1.603	9.180	15.874	19.216	24.851	23.915	32.666	32.209	31.678	23.395	17.439	14.474	9.133	9.757	8.229	7.697	5.341	3.917	2.034	909	807	470	429	397	283	272	59	0	0	-	-
	Total	-	2.150	11.799	21.935	27.011	34.370	33.241	42.027	41.752	40.906	30.568	23.332	19.647	12.099	12.431	10.983	9.542	6.884	5.510	3.053	1.421	1.262	779	669	635	422	419	102	0	0	-	-
	Overall Success Ratio	-	74,6%	77,8%	72,4%	71,1%	72,3%	71,9%	77,7%	77,1%	77,4%	76,5%	74,7%	73,7%	75,5%	78,5%	74,9%	80,7%	77,6%	71,1%	66,6%	64,0%	63,9%	60,3%	64,1%	62,5%	67,1%	64,9%	57,8%	0,0%	0,0%	-	-
	% Articles on Total	-	85,1%	90,9%	91,8%	91,7%	93,2%	93,3%	94,5%	94,6%	94,5%	93,6%	92,4%	93,3%	87,5%	90,9%	91,2%	92,9%	88,7%	89,5%	88,3%	96,6%	97,8%	96,9%	97,5%	95,0%	93,6%	96,2%	95,1%	0,0%	0,0%	-	-
	Foreign document suppliers are BLDSC, INIST, TU Delft, NIWI, BLUW
Table 4
	Number of requests submitted to Fax Suppliers	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
Articles
	Fail	-	-	783	1.244	1.568	1.602	1.742	1.376	1.591	1.505	777	638	754	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
	Success	-	-	2.734	4.378	3.951	4.280	4.701	3.248	3.491	2.933	1.585	1.022	750	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
	Total	-	-	3.517	5.622	5.519	5.882	6.443	4.624	5.082	4.438	2.362	1.660	1.504	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
	Articles Success Ratio	-	-	77,7%	77,9%	71,6%	72,8%	73,0%	70,2%	68,7%	66,1%	67,1%	61,6%	49,9%	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Monographs		-
	Fail	-	-	416	854	1.060	1.232	1.276	1.099	1.634	1.510	1.007	719	1.074	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
	Success	-	-	364	812	939	1.604	1.462	1.197	1.074	989	856	673	708	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
	Total	-	-	780	1.666	1.999	2.836	2.738	2.296	2.708	2.499	1.863	1.392	1.782	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
	Monographs Success Ratio	-	-	46,7%	48,7%	47,0%	56,6%	53,4%	52,1%	39,7%	39,6%	45,9%	48,3%	39,7%	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Total
	Fail	-	-	1.199	2.098	2.628	2.834	3.018	2.475	3.225	3.015	1.784	1.357	1.828	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
	Success	-	-	3.098	5.190	4.890	5.884	6.163	4.445	4.565	3.922	2.441	1.695	1.458	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
	Total	-	-	4.297	7.288	7.518	8.718	9.181	6.920	7.790	6.937	4.225	3.052	3.286	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
	Overall Success Ratio	-	-	72,1%	71,2%	65,0%	67,5%	67,1%	64,2%	58,6%	56,5%	57,8%	55,5%	44,4%	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
	% Articles on Total	-	-	81,8%	77,1%	73,4%	67,5%	70,2%	66,8%	65,2%	64,0%	55,9%	54,4%	45,8%	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
	In 1999 minder fax aanvragen wegens overgang van KUL-W van fax-bibliotheek naar online bibliotheek
	Fax-bibliotheken werden afgeschaft in 2005 (nieuwe versie van Impala
Table 5
	Number of requests submitted to University Libraries	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
Articles
	Fail	-	-	5.367	9.352	10.906	12.750	13.956	19.050	22.266	19.858	14.840	11.652	9.803	6.465	7.094	7.078	8.036	8.419	8.800	12.611	12.700	10.856	9.520	8.002	6.131	4.693	4.154	3.616	2.882	2.126	1.805	1.705
	Success	-	-	21.977	40.685	50.993	59.102	63.522	82.333	88.630	81.771	62.242	51.949	42.348	29.834	30.314	27.690	32.577	34.833	32.382	33.357	31.378	25.023	24.382	22.070	19.925	17.170	13.236	11.146	8.921	7.293	7.132	7.181
	Total	-	-	27.344	50.037	61.899	71.852	77.478	101.383	110.896	101.629	77.082	63.601	52.151	36.299	37.408	34.768	40.613	43.252	41.182	45.968	44.078	35.879	33.902	30.072	26.056	21.863	17.390	14.762	11.803	9.419	8.937	8.886
	Articles Success Ratio	-	-	80,4%	81,3%	82,4%	82,3%	82,0%	81,2%	79,9%	80,5%	80,7%	81,7%	81,2%	82,2%	81,0%	79,6%	80,2%	80,5%	78,6%	72,6%	71,2%	69,7%	71,9%	73,4%	76,5%	78,5%	76,1%	75,5%	75,6%	77,4%	79,8%	80,8%
Monographs		-	-
	Fail	-	-	3.084	4.553	4.328	6.381	6.627	7.253	7.817	7.095	6.701	6.068	5.362	4.100	4.246	3.834	3.026	2.832	2.386	2.288	2.407	2.472	2.623	2.742	2.385	1.891	1.805	1.595	1.478	1.389	1.000	1.133
	Success	-	-	6.253	7.995	7.882	12.921	13.614	15.467	15.843	15.567	15.392	14.661	14.273	12.566	12.983	13.075	12.040	11.757	10.896	11.158	11.963	12.327	14.130	14.679	14.204	12.239	11.184	10.084	7.121	8.229	7.343	7.012
	Total	-	-	9.337	12.548	12.210	19.302	20.241	22.720	23.660	22.662	22.093	20.729	19.635	16.666	17.229	16.909	15.066	14.589	13.282	13.446	14.370	14.799	16.753	17.421	16.589	14.130	12.989	11.679	8.599	9.618	8.343	8.145
	Monographs Success Ratio	-	-	67,0%	63,7%	64,6%	66,9%	67,3%	68,1%	67,0%	68,7%	69,7%	70,7%	72,7%	75,4%	75,4%	77,3%	79,9%	80,6%	82,0%	83,0%	83,2%	83,3%	84,3%	84,3%	85,6%	86,6%	86,1%	86,3%	82,8%	85,6%	88,0%	86,1%
Total
	Fail	-	-	8.451	13.905	15.234	19.131	20.583	26.303	30.083	26.953	21.541	17.720	15.165	10.565	11.340	10.912	11.062	11.251	11.186	14.899	15.107	13.328	12.143	10.744	8.516	6.584	5.959	5.211	4.360	3.515	2.805	2.838
	Success	-	-	28.230	48.680	58.875	72.023	77.136	97.800	104.473	97.338	77.634	66.610	56.621	42.400	43.297	40.765	44.617	46.590	43.278	44.515	43.341	37.350	38.512	36.749	34.129	29.409	24.420	21.230	16.042	15.522	14.475	14.193
	Total	-	-	36.681	62.585	74.109	91.154	97.719	124.103	134.556	124.291	99.175	84.330	71.786	52.965	54.637	51.677	55.679	57.841	54.464	59.414	58.448	50.678	50.655	47.493	42.645	35.993	30.379	26.441	20.402	19.037	17.280	17.031
	Overall Success Ratio	-	-	77,0%	77,8%	79,4%	79,0%	78,9%	78,8%	77,6%	78,3%	78,3%	79,0%	78,9%	80,1%	79,2%	78,9%	80,1%	80,5%	79,5%	74,9%	74,2%	73,7%	76,0%	77,4%	80,0%	81,7%	80,4%	80,3%	78,6%	81,5%	83,8%	83,3%
	% Articles on Total	-	-	74,5%	80,0%	83,5%	78,8%	79,3%	81,7%	82,4%	81,8%	77,7%	75,4%	72,6%	68,5%	68,5%	67,3%	72,9%	74,8%	75,6%	77,4%	75,4%	70,8%	66,9%	63,3%	61,1%	60,7%	57,2%	55,8%	57,9%	49,5%	51,7%	52,2%
Table 6
	Number of requests submitted to Public libraries	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
Articles
	Fail	-	-	-	-	-	-	-	-	-	205	301	339	333	417	297	426	394	356	410	310	369	413	850	944	651	362	337	292	143	122	85	10
	Success	-	-	-	-	-	-	-	-	-	420	622	872	919	696	789	868	875	776	765	725	632	552	817	841	662	525	459	388	192	203	80	17
	Total	-	-	-	-	-	-	-	-	-	625	923	1.211	1.252	1.113	1.086	1.294	1.269	1.132	1.175	1.035	1.001	965	1.667	1.785	1.313	887	796	680	335	325	165	27
	Articles Success Ratio	-	-	-	-	-	-	-	-	-	67,2%	67,4%	72,0%	73,4%	62,5%	72,7%	67,1%	69,0%	68,6%	65,1%	70,0%	63,1%	57,2%	49,0%	47,1%	50,4%	59,2%	57,7%	57,1%	57,3%	62,5%	48,5%	63,0%
Monographs		-	-	-	-	-	-	-	-	-
	Fail	-	-	-	-	-	-	-	-	-	3.687	10.801	14.195	20.468	23.688	26.089	26.075	26.979	28.615	26.907	30.600	32.832	34.389	30.757	29.089	24.479	21.357	20.802	18.617	13.783	13.554	5.517	105
	Success	-	-	-	-	-	-	-	-	-	4.395	16.234	19.768	29.734	33.504	42.182	46.990	57.431	61.562	64.074	74.966	78.258	79.246	74.881	72.227	62.158	60.508	62.196	59.039	39.817	41.462	16.146	184
	Total	-	-	-	-	-	-	-	-	-	8.082	27.035	33.963	50.202	57.192	68.271	73.065	84.410	90.177	90.981	105.566	111.090	113.635	105.638	101.316	86.637	81.865	82.998	77.656	53.600	55.016	21.663	289
	Monographs Success Ratio	-	-	-	-	-	-	-	-	-	54,4%	60,0%	58,2%	59,2%	58,6%	61,8%	64,3%	68,0%	68,3%	70,4%	71,0%	70,4%	69,7%	70,9%	71,3%	71,7%	73,9%	74,9%	76,0%	74,3%	75,4%	74,5%	63,7%
Total
	Fail	-	-	-	-	-	-	-	-	-	3.892	11.102	14.534	20.801	24.105	26.386	26.501	27.373	28.971	27.317	30.910	33.201	34.802	31.607	30.033	25.130	21.719	21.139	18.909	13.926	13.676	5.602	115
	Success	-	-	-	-	-	-	-	-	-	4.815	16.856	20.640	30.653	34.200	42.971	47.858	58.306	62.338	64.839	75.691	78.890	79.798	75.698	73.068	62.820	61.033	62.655	59.427	40.009	41.665	16.226	201
	Total	-	-	-	-	-	-	-	-	-	8.707	27.958	35.174	51.454	58.305	69.357	74.359	85.679	91.309	92.156	106.601	112.091	114.600	107.305	103.101	87.950	82.752	83.794	78.336	53.935	55.341	21.828	316
	Overall Success Ratio	-	-	-	-	-	-	-	-	-	55,3%	60,3%	58,7%	59,6%	58,7%	62,0%	64,4%	68,1%	68,3%	70,4%	71,0%	70,4%	69,6%	70,5%	70,9%	71,4%	73,8%	74,8%	75,9%	74,2%	75,3%	74,3%	63,6%
	% Articles on Total	-	-	-	-	-	-	-	-	-	7,2%	3,3%	3,4%	2,4%	1,9%	1,6%	1,7%	1,5%	1,2%	1,3%	1,0%	0,9%	0,8%	1,6%	1,7%	1,5%	1,1%	0,9%	0,9%	0,6%	0,6%	0,8%	8,5%
Table 7
	Number of requests submitted to Other types of libraries *	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016	2018	2018	2019	2020	2021	2022	2023
Articles
	Fail	-	-	-	-	-	-	-	-	-	2.586	1.857	1.116	980	1.319	1.284	1.405	1.405	1.337	1.369	1.294	1.296	1.588	1.557	1.597	1.300	1.130	1.048	1.012	848	760	611	564
	Success	-	-	-	-	-	-	-	-	-	12.203	8.308	4.170	3.609	3.629	4.086	4.123	4.456	4.069	3.911	3.756	3.118	3.092	3.922	2.787	2.423	2.034	1.799	1.451	1.248	1.178	928	886
	Total	-	-	-	-	-	-	-	-	-	14.789	10.165	5.286	4.589	4.948	5.370	5.528	5.861	5.406	5.280	5.050	4.414	4.680	5.479	4.384	3.723	3.164	2.847	2.463	2.096	1.938	1.539	1.450
	Articles Success Ratio	-	-	-	-	-	-	-	-	-	82,5%	81,7%	78,9%	78,6%	73,3%	76,1%	74,6%	76,0%	75,3%	74,1%	74,4%	70,6%	66,1%	71,6%	63,6%	65,1%	64,3%	63,2%	58,9%	59,5%	60,8%	60,3%	61,1%
Monographs		-	-	-	-	-	-	-	-	-
	Fail	-	-	-	-	-	-	-	-	-	1.795	1.387	891	648	860	724	898	874	810	847	885	1.140	1.009	1.088	1.238	1.154	1.110	961	809	669	664	628	685
	Success	-	-	-	-	-	-	-	-	-	2.554	2.749	1.593	1.544	2.680	2.814	3.096	3.031	3.451	3.824	3.967	4.302	4.204	4.197	4.569	4.272	3.688	3.193	2.856	2.136	2.274	2.039	2.287
	Total	-	-	-	-	-	-	-	-	-	4.349	4.136	2.484	2.192	3.540	3.538	3.994	3.905	4.261	4.671	4.852	5.442	5.213	5.285	5.807	5.426	4.798	4.154	3.665	2.805	2.938	2.667	2.972
	Monographs Success Ratio	-	-	-	-	-	-	-	-	-	58,7%	66,5%	64,1%	70,4%	75,7%	79,5%	77,5%	77,6%	81,0%	81,9%	81,8%	79,1%	80,6%	79,4%	78,7%	78,7%	76,9%	76,9%	77,9%	76,1%	77,4%	76,5%	77,0%
Total
	Fail	-	-	-	-	-	-	-	-	-	4.381	3.244	2.007	1.628	2.179	2.008	2.303	2.279	2.147	2.216	2.179	2.436	2.597	2.645	2.835	2.454	2.240	2.009	1.821	1.517	1.424	1.239	1.249
	Success	-	-	-	-	-	-	-	-	-	14.757	11.057	5.763	5.153	6.309	6.900	7.219	7.487	7.520	7.735	7.723	7.420	7.296	8.119	7.356	6.695	5.722	4.992	4.307	3.384	3.452	2.967	3.173
	Total	-	-	-	-	-	-	-	-	-	19.138	14.301	7.770	6.781	8.488	8.908	9.522	9.766	9.667	9.951	9.902	9.856	9.893	10.764	10.191	9.149	7.962	7.001	6.128	4.901	4.876	4.206	4.422
	Overall Success Ratio	-	-	-	-	-	-	-	-	-	77,1%	77,3%	74,2%	76,0%	74,3%	77,5%	75,8%	76,7%	77,8%	77,7%	78,0%	75,3%	73,7%	75,4%	72,2%	73,2%	71,9%	71,3%	70,3%	69,0%	70,8%	70,5%	71,8%
	% Articles on Total	-	-	-	-	-	-	-	-	-	77,3%	71,1%	68,0%	67,7%	58,3%	60,3%	58,1%	60,0%	55,9%	53,1%	51,0%	44,8%	47,3%	50,9%	43,0%	40,7%	39,7%	40,7%	40,2%	42,8%	39,7%	36,6%	32,8%
	* governmental libraries, corporate libraries; schools for higher education, special libraries; including SBA - Stadsbibliotheek Antwerpen and KBR - Royal Library Albert I
Table 8
	Number of requests submitted by University Libraries	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
Articles
	Fail	-	-	2.897	5.802	7.030	6.462	6.413	7.348	7.792	8.062	6.356	5.387	4.489	3.558	3.717	3.611	3.802	3.383	3.003	3.523	3.239	3.032	2.834	2.505	1.790	1.284	1.325	1.148	1.049	712	650	560
	Success	-	-	26.331	47.221	52.152	55.319	59.079	64.229	68.933	66.466	51.860	39.942	32.659	23.324	25.816	24.109	25.227	23.363	19.724	18.571	15.968	14.505	16.436	12.135	10.221	8.058	7.108	5.826	4.273	3.144	3.046	3.043
	Total	-	-	29.228	53.023	59.182	61.781	65.492	71.577	76.725	74.528	58.216	45.329	37.148	26.882	29.533	27.720	29.029	26.746	22.727	22.094	19.207	17.537	19.270	14.640	12.011	9.342	8.433	6.974	5.322	3.856	3.696	3.603
	Articles Success Ratio	-	-	90,1%	89,1%	88,1%	89,5%	90,2%	89,7%	89,8%	89,2%	89,1%	88,1%	87,9%	86,8%	87,4%	87,0%	86,9%	87,4%	86,8%	84,1%	83,1%	82,7%	85,3%	82,9%	85,1%	86,3%	84,3%	83,5%	80,3%	81,5%	82,4%	84,5%
Monographs		-	-
	Fail	-	-	2.841	3.985	4.007	5.191	5.551	6.467	6.961	6.934	6.357	5.503	4.335	4.057	3.805	3.785	2.903	2.944	2.606	2.274	2.141	2.211	2.311	2.268	2.018	1.531	1.597	1.343	1.304	1.221	1.003	979
	Success	-	-	7.525	10.121	9.664	15.600	16.170	18.140	18.286	17.921	17.324	16.414	15.905	13.928	14.233	14.329	13.061	12.980	12.104	11.905	12.097	12.373	13.903	14.517	13.986	11.986	11.012	9.773	7.075	8.264	7.194	7.128
	Total	-	-	10.366	14.106	13.671	20.791	21.721	24.607	25.247	24.855	23.681	21.917	20.240	17.985	18.038	18.114	15.964	15.924	14.710	14.179	14.238	14.584	16.214	16.785	16.004	13.517	12.609	11.116	8.379	9.485	8.197	8.107
	Monographs Success Ratio	-	-	72,6%	71,7%	70,7%	75,0%	74,4%	73,7%	72,4%	72,1%	73,2%	74,9%	78,6%	77,4%	78,9%	79,1%	81,8%	81,5%	82,3%	84,0%	85,0%	84,8%	85,7%	86,5%	87,4%	88,7%	87,3%	87,9%	84,4%	87,1%	87,8%	87,9%
Total
	Fail	-	-	5.738	9.787	11.037	11.653	11.964	13.815	14.753	14.996	12.713	10.890	8.824	7.615	7.522	7.396	6.705	6.327	5.609	5.797	5.380	5.243	5.145	4.773	3.808	2.815	2.922	2.491	2.353	1.933	1.653	1.539
	Success	-	-	33.856	57.342	61.816	70.919	75.249	82.369	87.219	84.387	69.184	56.356	48.564	37.252	40.049	38.438	38.288	36.343	31.828	30.476	28.065	26.878	30.339	26.652	24.207	20.044	18.120	15.599	11.348	11.408	10.240	10.171
	Total	-	-	39.594	67.129	72.853	82.572	87.213	96.184	101.972	99.383	81.897	67.246	57.388	44.867	47.571	45.834	44.993	42.670	37.437	36.273	33.445	32.121	35.484	31.425	28.015	22.859	21.042	18.090	13.701	13.341	11.893	11.710
	Overall Success Ratio	-	-	85,5%	85,4%	84,9%	85,9%	86,3%	85,6%	85,5%	84,9%	84,5%	83,8%	84,6%	83,0%	84,2%	83,9%	85,1%	85,2%	85,0%	84,0%	83,9%	83,7%	85,5%	84,8%	86,4%	87,7%	86,1%	86,2%	82,8%	85,5%	86,1%	86,9%
	% Articles on Total	-	-	73,8%	79,0%	81,2%	74,8%	75,1%	74,4%	75,2%	75,0%	71,1%	67,4%	64,7%	59,9%	62,1%	60,5%	64,5%	62,7%	60,7%	60,9%	57,4%	54,6%	54,3%	46,6%	42,9%	40,9%	40,1%	38,6%	38,8%	28,9%	31,1%	30,8%
Table 9
	Number of requests submitted by Public libraries	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
Articles
	Fail	-	-	-	-	-	-	-	-	-	89	152	219	160	275	199	183	156	133	164	120	110	124	242	288	205	172	127	116	61	71	39	14
	Success	-	-	-	-	-	-	-	-	-	452	706	975	1.010	762	818	910	960	817	806	791	686	609	837	920	679	585	491	440	230	254	104	59
	Total	-	-	-	-	-	-	-	-	-	541	858	1.194	1.170	1.037	1.017	1.093	1.116	950	970	911	796	733	1.079	1.208	884	757	618	556	291	325	143	73
	Articles Success Ratio	-	-	-	-	-	-	-	-	-	83,5%	82,3%	81,7%	86,3%	73,5%	80,4%	83,3%	86,0%	86,0%	83,1%	86,8%	86,2%	83,1%	77,6%	76,2%	76,8%	77,3%	79,4%	79,1%	79,0%	78,2%	72,7%	80,8%
Monographs
	Fail	-	-	-	-	-	-	-	-	-	1.951	4.280	5.210	5.081	8.728	9.376	47.250	10.043	11.143	10.631	12.192	11.634	12.436	12.147	11.828	10.698	8.953	9.107	8.886	6.720	5.962	2.719	63
	Success	-	-	-	-	-	-	-	-	-	4.485	16.555	20.020	29.963	33.684	42.401	9.717	57.642	61.660	64.169	75.212	78.504	79.615	75.195	72.520	62.415	60.777	62.328	59.225	39.941	41.651	16.188	213
	Total	-	-	-	-	-	-	-	-	-	6.436	20.835	25.230	35.044	42.412	51.777	56.967	67.685	72.803	74.800	87.404	90.138	92.051	87.342	84.348	73.113	69.730	71.435	68.111	46.661	47.613	18.907	276
	Monographs Success Ratio	-	-	-	-	-	-	-	-	-	69,7%	79,5%	79,3%	85,5%	79,4%	81,9%	17,1%	85,2%	84,7%	85,8%	86,1%	87,1%	86,5%	86,1%	86,0%	85,4%	87,2%	87,3%	87,0%	85,6%	87,5%	85,6%	77,2%
Total
	Fail	-	-	-	-	-	-	-	-	-	2.040	4.432	5.429	5.241	9.003	9.575	47.433	10.199	11.276	10.795	12.312	11.744	12.560	12.389	12.116	10.903	9.125	9.234	9.002	6.781	6.033	2.758	77
	Success	-	-	-	-	-	-	-	-	-	4.937	17.261	20.995	30.973	34.446	43.219	10.627	58.602	62.477	64.975	76.003	79.190	80.224	76.032	73.440	63.094	61.362	62.819	59.665	40.171	41.905	16.292	272
	Total	-	-	-	-	-	-	-	-	-	6.977	21.693	26.424	36.214	43.449	52.794	58.060	68.801	73.753	75.770	88.315	90.934	92.784	88.421	85.556	73.997	70.487	72.053	68.667	46.952	47.938	19.050	349
	Overall Success Ratio	-	-	-	-	-	-	-	-	-	70,8%	79,6%	79,5%	85,5%	79,3%	81,9%	18,3%	85,2%	84,7%	85,8%	86,1%	87,1%	86,5%	86,0%	85,8%	85,3%	87,1%	87,2%	86,9%	85,6%	87,4%	85,5%	77,9%
	% Articles on Total	-	-	-	-	-	-	-	-	-	7,8%	4,0%	4,5%	3,2%	2,4%	1,9%	1,9%	1,6%	1,3%	1,3%	1,0%	0,9%	0,8%	1,2%	1,4%	1,2%	1,1%	0,9%	0,8%	0,6%	0,7%	0,8%	20,9%
Table 10
	Number of requests submitted by Corporate libraries	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
Articles
	Fail	-	-	-	-	-	-	-	-	-	2.760	1.964	1.690	913	969	663	652	626	734	1.070	626	474	446	511	358	326	230	122	113	81	60	65	62
	Success	-	-	-	-	-	-	-	-	-	51.024	33.233	27.973	21.381	11.630	9.928	6.422	7.211	7.290	5.987	5.131	2.973	2.590	3.064	3.819	4.118	3.588	2.098	1.696	1.406	1.163	1.195	1.004
	Total	-	-	-	-	-	-	-	-	-	53.784	35.197	29.663	22.294	12.599	10.591	7.074	7.837	8.024	7.057	5.757	3.447	3.036	3.575	4.177	4.444	3.818	2.220	1.809	1.487	1.223	1.260	1.066
	Articles Success Ratio	-	-	-	-	-	-	-	-	-	94,9%	94,4%	94,3%	95,9%	92,3%	93,7%	90,8%	92,0%	90,9%	84,8%	89,1%	86,2%	85,3%	85,7%	91,4%	92,7%	94,0%	94,5%	93,8%	94,6%	95,1%	94,8%	94,2%
Monographs
	Fail	-	-	-	-	-	-	-	-	-	256	224	207	60	101	83	90	51	67	60	48	40	43	15	10	7	7	16	5	16	8	10	3
	Success	-	-	-	-	-	-	-	-	-	380	356	236	205	168	157	182	153	211	118	72	123	111	87	66	57	49	46	36	24	27	26	40
	Total	-	-	-	-	-	-	-	-	-	636	580	443	265	269	240	272	204	278	178	120	163	154	102	76	64	56	62	41	40	35	36	43
	Monographs Success Ratio	-	-	-	-	-	-	-	-	-	59,7%	61,4%	53,3%	77,4%	62,5%	65,4%	66,9%	75,0%	75,9%	66,3%	60,0%	75,5%	72,1%	85,3%	86,8%	89,1%	87,5%	74,2%	87,8%	60,0%	77,1%	72,2%	93,0%
Total
	Fail	-	-	-	-	-	-	-	-	-	3.016	2.188	1.897	973	1.070	746	742	677	801	1.130	674	514	489	526	368	333	237	138	118	97	68	75	65
	Success	-	-	-	-	-	-	-	-	-	51.404	33.589	28.209	21.586	11.798	10.085	6.604	7.364	7.501	6.105	5.203	3.096	2.701	3.151	3.885	4.175	3.637	2.144	1.732	1.430	1.190	1.221	1.044
	Total	-	-	-	-	-	-	-	-	-	54.420	35.777	30.106	22.559	12.868	10.831	7.346	8.041	8.302	7.235	5.877	3.610	3.190	3.677	4.253	4.508	3.874	2.282	1.850	1.527	1.258	1.296	1.109
	Overall Success Ratio	-	-	-	-	-	-	-	-	-	94,5%	93,9%	93,7%	95,7%	91,7%	93,1%	89,9%	91,6%	90,4%	84,4%	88,5%	85,8%	84,7%	85,7%	91,3%	92,6%	93,9%	94,0%	93,6%	93,6%	94,6%	94,2%	94,1%
	% Articles on Total	-	-	-	-	-	-	-	-	-	98,8%	98,4%	98,5%	98,8%	97,9%	97,8%	96,3%	97,5%	96,7%	97,5%	98,0%	95,5%	95,2%	97,2%	98,2%	98,6%	98,6%	97,3%	97,8%	97,4%	97,2%	97,2%	96,1%
Table 11
	Number of requests submitted by Schools Higer Education	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
Articles
	Fail	-	-	-	-	-	-	-	-	-	69	93	83	48	110	135	146	169	134	179	119	178	242	185	154	128	149	72	66	97	104	93	115
	Success	-	-	-	-	-	-	-	-	-	421	470	485	613	764	1.061	1.184	1.089	922	999	824	882	989	914	776	808	652	427	395	409	463	431	475
	Total	-	-	-	-	-	-	-	-	-	490	563	568	661	874	1.196	1.330	1.258	1.056	1.178	943	1.060	1.231	1.099	930	936	801	499	461	506	567	524	590
	Articles Success Ratio	-	-	-	-	-	-	-	-	-	85,9%	83,5%	85,4%	92,7%	87,4%	88,7%	89,0%	86,6%	87,3%	84,8%	87,4%	83,2%	80,3%	83,2%	83,4%	86,3%	81,4%	85,6%	85,7%	80,8%	81,7%	82,3%	80,5%
Monographs
	Fail	-	-	-	-	-	-	-	-	-	111	158	150	116	175	142	167	137	189	169	153	240	222	328	319	295	291	246	205	189	177	160	225
	Success	-	-	-	-	-	-	-	-	-	346	431	377	474	569	579	663	652	954	1.154	1.029	1.366	1.401	1.722	1.705	1.675	1.556	1.457	1.173	813	794	948	1.004
	Total	-	-	-	-	-	-	-	-	-	457	589	527	590	744	721	830	789	1.143	1.323	1.182	1.606	1.623	2.050	2.024	1.970	1.847	1.703	1.378	1.002	971	1.108	1.229
	Monographs Success Ratio	-	-	-	-	-	-	-	-	-	75,7%	73,2%	71,5%	80,3%	76,5%	80,3%	79,9%	82,6%	83,5%	87,2%	87,1%	85,1%	86,3%	84,0%	84,2%	85,0%	84,2%	85,6%	85,1%	81,1%	81,8%	85,6%	81,7%
Total
	Fail	-	-	-	-	-	-	-	-	-	180	251	233	164	285	277	313	306	323	348	272	418	464	513	473	423	440	318	271	286	281	253	340
	Success	-	-	-	-	-	-	-	-	-	767	901	862	1.087	1.333	1.640	1.847	1.741	1.876	2.153	1.853	2.248	2.390	2.636	2.481	2.483	2.208	1.884	1.568	1.222	1.257	1.379	1.479
	Total	-	-	-	-	-	-	-	-	-	947	1.152	1.095	1.251	1.618	1.917	2.160	2.047	2.199	2.501	2.125	2.666	2.854	3.149	2.954	2.906	2.648	2.202	1.839	1.508	1.538	1.632	1.819
	Overall Success Ratio	-	-	-	-	-	-	-	-	-	81,0%	78,2%	78,7%	86,9%	82,4%	85,6%	85,5%	85,1%	85,3%	86,1%	87,2%	84,3%	83,7%	83,7%	84,0%	85,4%	83,4%	85,6%	85,3%	81,0%	81,7%	84,5%	81,3%
	% Articles on Total	-	-	-	-	-	-	-	-	-	51,7%	48,9%	51,9%	52,8%	54,0%	62,4%	61,6%	61,5%	48,0%	47,1%	44,4%	39,8%	43,1%	34,9%	31,5%	32,2%	30,2%	22,7%	25,1%	33,6%	36,9%	32,1%	32,4%
Table 12
	Number of requests submitted by Special libraries	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
Articles
	Fail	-	-	-	-	-	-	-	-	-	309	332	259	290	194	153	137	127	117	174	284	303	292	373	258	248	176	249	221	160	110	93	71
	Success	-	-	-	-	-	-	-	-	-	2.880	2.780	2.513	2.269	1.131	1.082	1.095	1.184	1.332	1.920	2.402	2.798	2.752	2.860	2.580	2.142	2.062	1.678	1.433	1.351	1.165	1.023	813
	Total	-	-	-	-	-	-	-	-	-	3.189	3.112	2.772	2.559	1.325	1.235	1.232	1.311	1.449	2.094	2.686	3.101	3.044	3.233	2.838	2.390	2.238	1.927	1.654	1.511	1.275	1.116	884
	Articles Success Ratio	-	-	-	-	-	-	-	-	-	90,3%	89,3%	90,7%	88,7%	85,4%	87,6%	88,9%	90,3%	91,9%	91,7%	89,4%	90,2%	90,4%	88,5%	90,9%	89,6%	92,1%	87,1%	86,6%	89,4%	91,4%	91,7%	92,0%
Monographs
	Fail	-	-	-	-	-	-	-	-	-	167	54	122	195	121	102	53	52	20	28	62	108	77	76	62	64	62	34	36	38	17	26	20
	Success	-	-	-	-	-	-	-	-	-	161	181	223	390	161	157	100	127	100	129	274	353	356	306	335	279	225	198	215	114	82	120	113
	Total	-	-	-	-	-	-	-	-	-	328	235	345	585	282	259	153	179	120	157	336	461	433	382	397	343	287	232	251	152	99	146	133
	Monographs Success Ratio	-	-	-	-	-	-	-	-	-	49,1%	77,0%	64,6%	66,7%	57,1%	60,6%	65,4%	70,9%	83,3%	82,2%	81,5%	76,6%	82,2%	80,1%	84,4%	81,3%	78,4%	85,3%	85,7%	75,0%	82,8%	82,2%	85,0%
Total
	Fail	-	-	-	-	-	-	-	-	-	476	386	381	485	315	255	190	179	137	202	346	411	369	449	320	312	238	283	257	198	127	119	91
	Success	-	-	-	-	-	-	-	-	-	3.041	2.961	2.736	2.659	1.292	1.239	1.195	1.311	1.432	2.049	2.676	3.151	3.108	3.166	2.915	2.421	2.287	1.876	1.648	1.465	1.247	1.143	926
	Total	-	-	-	-	-	-	-	-	-	3.517	3.347	3.117	3.144	1.607	1.494	1.385	1.490	1.569	2.251	3.022	3.562	3.477	3.615	3.235	2.733	2.525	2.159	1.905	1.663	1.374	1.262	1.017
	Overall Success Ratio	-	-	-	-	-	-	-	-	-	86,5%	88,5%	87,8%	84,6%	80,4%	82,9%	86,3%	88,0%	91,3%	91,0%	88,6%	88,5%	89,4%	87,6%	90,1%	88,6%	90,6%	86,9%	86,5%	88,1%	90,8%	90,6%	91,1%
	% Articles on Total	-	-	-	-	-	-	-	-	-	90,7%	93,0%	88,9%	81,4%	82,5%	82,7%	89,0%	88,0%	92,4%	93,0%	88,9%	87,1%	87,5%	89,4%	87,7%	87,4%	88,6%	89,3%	86,8%	90,9%	92,8%	88,4%	86,9%
Table 13
	Number of requests submitted by Government libraries	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
Articles
	Fail	-	-	-	-	-	-	-	-	-	604	428	366	252	396	326	464	408	415	547	463	470	333	341	277	242	225	245	249	221	189	154	176
	Success	-	-	-	-	-	-	-	-	-	5.355	4.358	3.337	3.478	3.696	4.119	4.293	4.803	4.465	4.736	3.781	3.550	2.750	2.157	2.443	1.985	1.904	1.598	1.702	1.424	1.400	1.356	1.342
	Total	-	-	-	-	-	-	-	-	-	5.959	4.786	3.703	3.730	4.092	4.445	4.757	5.211	4.880	5.283	4.244	4.020	3.083	2.498	2.720	2.227	2.129	1.843	1.951	1.645	1.589	1.510	1.518
	Articles Success Ratio	-	-	-	-	-	-	-	-	-	89,9%	91,1%	90,1%	93,2%	90,3%	92,7%	90,2%	92,2%	91,5%	89,6%	89,1%	88,3%	89,2%	86,3%	89,8%	89,1%	89,4%	86,7%	87,2%	86,6%	88,1%	89,8%	88,4%
Monographs
	Fail	-	-	-	-	-	-	-	-	-	214	197	255	105	151	170	179	184	155	166	176	182	196	166	204	198	187	119	136	120	101	93	97
	Success	-	-	-	-	-	-	-	-	-	520	585	826	698	501	560	633	655	690	681	769	794	825	893	1.085	981	872	662	840	569	591	569	544
	Total	-	-	-	-	-	-	-	-	-	734	782	1.081	803	652	730	812	839	845	847	945	976	1.021	1.059	1.289	1.179	1.059	781	976	689	692	662	641
	Monographs Success Ratio	-	-	-	-	-	-	-	-	-	70,8%	74,8%	76,4%	86,9%	76,8%	76,7%	78,0%	78,1%	81,7%	80,4%	81,4%	81,4%	80,8%	84,3%	84,2%	83,2%	82,3%	84,8%	86,1%	82,6%	85,4%	86,0%	84,9%
Total
	Fail	-	-	-	-	-	-	-	-	-	818	625	621	357	547	496	643	592	570	713	639	652	529	507	481	440	412	364	385	341	290	247	273
	Success	-	-	-	-	-	-	-	-	-	5.875	4.943	4.163	4.176	4.197	4.679	4.926	5.458	5.155	5.417	4.550	4.344	3.575	3.050	3.528	2.966	2.776	2.260	2.542	1.993	1.991	1.925	1.886
	Total	-	-	-	-	-	-	-	-	-	6.693	5.568	4.784	4.533	4.744	5.175	5.569	6.050	5.725	6.130	5.189	4.996	4.104	3.557	4.009	3.406	3.188	2.624	2.927	2.334	2.281	2.172	2.159
	Overall Success Ratio	-	-	-	-	-	-	-	-	-	87,8%	88,8%	87,0%	92,1%	88,5%	90,4%	88,5%	90,2%	90,0%	88,4%	87,7%	86,9%	87,1%	85,7%	88,0%	87,1%	87,1%	86,1%	86,8%	85,4%	87,3%	88,6%	87,4%
	% Articles on Total	-	-	-	-	-	-	-	-	-	89,0%	86,0%	77,4%	82,3%	86,3%	85,9%	85,4%	86,1%	85,2%	86,2%	81,8%	80,5%	75,1%	70,2%	67,8%	65,4%	66,8%	70,2%	66,7%	70,5%	69,7%	69,5%	70,3%
Table 14
	Number of requests submitted by other types of scientific/academic libraries	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
Articles
	Fail	-	-	-	-	-	-	-	-	-	199	286	227	35	324	302	584	657	782	840	1.679	2.285	1.075	970	737	674	588	574	418	287	215	180	183
	Success	-	-	-	-	-	-	-	-	-	1.427	1.828	1.495	1.843	2.245	2.248	3.389	4.820	6.351	6.529	8.217	9.788	5.270	6.331	5.847	5.371	5.023	3.840	2.787	2.254	2.029	1.866	2.051
	Total	-	-	-	-	-	-	-	-	-	1.626	2.114	1.722	1.878	2.569	2.550	3.973	5.477	7.133	7.369	9.896	12.073	6.345	7.301	6.584	6.045	5.611	4.414	3.205	2.541	2.244	2.046	2.234
	Articles Success Ratio	-	-	-	-	-	-	-	-	-	87,8%	86,5%	86,8%	98,1%	87,4%	88,2%	85,3%	88,0%	89,0%	88,6%	83,0%	81,1%	83,1%	86,7%	88,8%	88,9%	89,5%	87,0%	87,0%	88,7%	90,4%	91,2%	91,8%
Monographs
	Fail	-	-	-	-	-	-	-	-	-	185	259	127	2	186	113	143	402	99	135	179	246	238	243	195	169	149	135	132	120	88	78	101
	Success	-	-	-	-	-	-	-	-	-	527	590	344	406	347	218	342	269	476	603	934	1.313	1.234	982	1.055	965	807	693	700	416	417	415	440
	Total	-	-	-	-	-	-	-	-	-	712	849	471	408	533	331	485	671	575	738	1.113	1.559	1.472	1.225	1.250	1.134	956	828	832	536	505	493	541
	Monographs Success Ratio	-	-	-	-	-	-	-	-	-	74,0%	69,5%	73,0%	99,5%	65,1%	65,9%	70,5%	40,1%	82,8%	81,7%	83,9%	84,2%	83,8%	80,2%	84,4%	85,1%	84,4%	83,7%	84,1%	77,6%	82,6%	84,2%	81,3%
Total
	Fail	-	-	-	-	-	-	-	-	-	384	545	354	37	510	415	727	1.059	881	975	1.858	2.531	1.313	1.213	932	843	737	709	550	407	303	258	284
	Success	-	-	-	-	-	-	-	-	-	1.954	2.418	1.839	2.249	2.592	2.466	3.731	5.089	6.827	7.132	9.151	11.101	6.504	7.313	6.902	6.336	5.830	4.533	3.487	2.670	2.446	2.281	2.491
	Total	-	-	-	-	-	-	-	-	-	2.338	2.963	2.193	2.286	3.102	2.881	4.458	6.148	7.708	8.107	11.009	13.632	7.817	8.526	7.834	7.179	6.567	5.242	4.037	3.077	2.749	2.539	2.775
	Overall Success Ratio	-	-	-	-	-	-	-	-	-	83,6%	81,6%	83,9%	98,4%	83,6%	85,6%	83,7%	82,8%	88,6%	88,0%	83,1%	81,4%	83,2%	85,8%	88,1%	88,3%	88,8%	86,5%	86,4%	86,8%	89,0%	89,8%	89,8%
	% Articles on Total	-	-	-	-	-	-	-	-	-	69,5%	71,3%	78,5%	82,2%	82,8%	88,5%	89,1%	89,1%	92,5%	90,9%	89,9%	88,6%	81,2%	85,6%	84,0%	84,2%	85,4%	84,2%	79,4%	82,6%	81,6%	80,6%	80,5%
Table 15
Total number of requests submitted in Impala
Year	Books	Articles	Total	Verschil
1992	5.100	5.163	10.263	10.263
1993	6.405	15.690	22.095	11.832
1994	10.962	40.083	51.045	28.950
1995	14.953	73.124	88.077	37.032
1996	14.926	91.089	106.015	17.938
1997	22.512	107.802	130.314	24.299
1998	23.845	114.329	138.174	7.860
1999	27.079	147.379	174.458	36.284
2000	27.775	149.811	177.586	3.128
2001	34.195	140.152	174.347	-3.239
2002	47.609	104.946	152.555	-21.792
2003	50.021	84.999	135.020	-17.535
2004	61.854	71.385	133.239	-1.781
2005	62.773	49.758	112.531	-20.708
2006	72.237	51.517	123.754	11.223
2007	77.653	47.413	125.066	1.312
2008	86.331	51.239	137.570	12.504
2009	91.688	50.238	141.926	4.356
2010	92.753	46.678	139.431	-2.495
2011	105.279	46.531	151.810	12.379
2012	109.141	43.704	152.845	1.035
2013	111.420	35.033	146.453	-6.392
2014	108.478	34.042	142.520	-3.933
2015	106.318	30.472	136.790	-5.730
2016	94.091	26.800	120.891	-15.899
2017	87.479	22.688	110.167	-10.724
2018	87.830	18.276	106.106	-4.061
2019	82.707	15.194	97.901	-8.205
2020	57.558	12.258	69.816	-28.085
2021	59.543	10.104	69.647	-169
2022	29.602	9.373	38.975	-30.672
2023	10.968	9.214	20.182	-18.793
Table 16
Total number of requests submitted in Impala by University Libraries
Year	Books	Articles	Total	% on Total Impala
1994	10.366	29.228	39.594	77,6%
1995	14.106	53.023	67.129	76,2%
1996	13.671	59.182	72.853	68,7%
1997	20.791	61.781	82.572	63,4%
1998	21.721	65.492	87.213	63,1%
1999	24.607	71.577	96.184	55,1%
2000	25.247	76.725	101.972	57,4%
2001	24.855	74.528	99.383	57,0%
2002	23.681	58.216	81.897	53,7%
2003	21.917	45.329	67.246	49,8%
2004	20.240	37.148	57.388	43,1%
2005	17.985	26.882	44.867	39,9%
2006	18.038	29.533	47.571	38,4%
2007	18.114	27.720	45.834	36,6%
2008	15.964	29.029	44.993	32,7%
2009	15.924	26.746	42.670	30,1%
2010	14.710	22.727	37.437	26,8%
2011	14.179	22.094	36.273	23,9%
2012	14.238	19.207	33.445	21,9%
2013	14.584	17.537	32.121	21,9%
2014	16.214	19.270	35.484	24,9%
2015	16.785	14.640	31.425	23,0%
2016	16.004	12.011	28.015	23,2%
2017	13.517	9.342	22.859	20,7%
2018	12.609	8.433	21.042	19,8%
2019	11.116	6.974	18.090	18,5%
2020	8.379	5.322	13.701	19,6%
2021	9.485	3.856	13.341	19,2%
2022	8.197	3.696	11.893	30,5%
2023	8.107	3.603	11.710	58,0%
Table 17
Total number of requests submitted in Impala by Public libraries
Year	Books	Articles	Total	% on Total Impala
2001	6.436	541	6.977	4,0%
2002	20.835	858	21.693	14,2%
2003	25.230	1.194	26.424	19,6%
2004	35.044	1.170	36.214	27,2%
2005	42.412	1.037	43.449	38,6%
2006	51.777	1.017	52.794	42,7%
2007	56.967	1.093	58.060	46,4%
2008	67.685	1.116	68.801	50,0%
2009	72.803	950	73.753	52,0%
2010	74.800	970	75.770	54,3%
2011	87.404	911	88.315	58,2%
2012	90.138	796	90.934	59,5%
2013	92.051	733	92.784	63,4%
2014	87.342	1.079	88.421	62,0%
2015	84.348	1.208	85.556	62,5%
2016	73.113	884	73.997	61,2%
2017	69.730	757	70.487	64,0%
2018	71.435	618	72.053	67,9%
2019	68.111	556	68.667	70,1%
2020	46.661	291	46.952	67,3%
2021	47.613	325	47.938	68,8%
2022	18.907	143	19.050	48,9%
2023	276	73	349	1,7%
Table 18
Total number of requests submitted in Impala by Corporate libraries
Year	Books	Articles	Total	% on Total Impala
2001	636	53.784	54.420	31,2%
2002	580	35.197	35.777	23,5%
2003	443	29.663	30.106	22,3%
2004	265	22.294	22.559	16,9%
2005	269	12.599	12.868	11,4%
2006	240	10.591	10.831	8,8%
2007	272	7.074	7.346	5,9%
2008	204	7.837	8.041	5,8%
2009	278	8.024	8.302	5,8%
2010	178	7.057	7.235	5,2%
2011	120	5.757	5.877	3,9%
2012	163	3.447	3.610	2,4%
2013	154	3.036	3.190	2,2%
2014	102	3.575	3.677	2,6%
2015	76	4.177	4.253	3,1%
2016	64	4.444	4.508	3,7%
2017	56	3.818	3.874	3,5%
2018	62	2.220	2.282	2,2%
2019	41	1.809	1.850	1,9%
2020	40	1.487	1.527	2,2%
2021	35	1.223	1.258	1,8%
2022	36	1.260	1.296	3,3%
2023	43	1.066	1.109	5,5%
Table 19
Total number of requests submitted in Impala by Schools Higher Education
Year	Books	Articles	Total	% on Total Impala
2001	457	457	914	0,5%
2002	589	563	1.152	0,8%
2003	527	568	1.095	0,8%
2004	590	661	1.251	0,9%
2005	744	874	1.618	1,4%
2006	721	1.196	1.917	1,5%
2007	830	1.330	2.160	1,7%
2008	789	1.258	2.047	1,5%
2009	1.143	1.056	2.199	1,5%
2010	1.323	1.178	2.501	1,8%
2011	1.182	943	2.125	1,4%
2012	1.606	1.060	2.666	1,7%
2013	1.623	1.231	2.854	1,9%
2014	2.050	1.099	3.149	2,2%
2015	2.024	930	2.954	2,2%
2016	1.970	936	2.906	2,4%
2017	1.847	801	2.648	2,4%
2018	1.703	499	2.202	2,1%
2019	1.378	461	1.839	1,9%
2020	1.002	506	1.508	2,2%
2021	971	567	1.538	2,2%
2022	1.108	524	1.632	4,2%
2023	1.229	590	1.819	9,0%
Table 20
Total number of requests submitted in Impala by Special libraries
Year	Books	Articles	Total	% on Total Impala
2001	328	3.189	3.517	2,0%
2002	235	3.112	3.347	2,2%
2003	345	2.772	3.117	2,3%
2004	585	2.559	3.144	2,4%
2005	282	1.325	1.607	1,4%
2006	259	1.235	1.494	1,2%
2007	153	1.232	1.385	1,1%
2008	179	1.311	1.490	1,1%
2009	120	1.449	1.569	1,1%
2010	157	2.094	2.251	1,6%
2011	336	2.686	3.022	2,0%
2012	461	3.101	3.562	2,3%
2013	433	3.044	3.477	2,4%
2014	382	3.233	3.615	2,5%
2015	397	2.838	3.235	2,4%
2016	343	2.390	2.733	2,3%
2017	287	2.238	2.525	2,3%
2018	232	1.927	2.159	2,0%
2019	251	1.654	1.905	1,9%
2020	152	1.511	1.663	2,4%
2021	99	1.275	1.374	2,0%
2022	146	1.116	1.262	3,2%
2023	133	884	1.017	5,0%
Table 21
Total number of requests submitted in Impala by Government libraries
Year	Books	Articles	Total	% on Total Impala
2001	734	5.959	6.693	3,8%
2002	782	4.786	5.568	3,6%
2003	1.081	3.703	4.784	3,5%
2004	803	3.730	4.533	3,4%
2005	652	4.092	4.744	4,2%
2006	730	4.445	5.175	4,2%
2007	812	4.757	5.569	4,5%
2008	839	5.211	6.050	4,4%
2009	845	4.880	5.725	4,0%
2010	847	5.283	6.130	4,4%
2011	945	4.244	5.189	3,4%
2012	976	4.020	4.996	3,3%
2013	1.021	3.083	4.104	2,8%
2014	1.059	2.498	3.557	2,5%
2015	1.289	2.720	4.009	2,9%
2016	1.179	2.227	3.406	2,8%
2017	1.059	2.129	3.188	2,9%
2018	781	1.843	2.624	2,5%
2019	976	1.951	2.927	3,0%
2020	689	1.645	2.334	3,3%
2021	692	1.589	2.281	3,3%
2022	662	1.510	2.172	5,6%
2023	641	1.518	2.159	10,7%
Table 22
Total number of requests submitted in Impala by Other types of Sc./Ac. libraries
Year	Books	Articles	Total	% on Total Impala
2001	712	1.626	2.338	1,3%
2002	849	2.114	2.963	1,9%
2003	471	1.722	2.193	1,6%
2004	408	1.878	2.286	1,7%
2005	533	2.569	3.102	2,8%
2006	331	2.550	2.881	2,3%
2007	485	3.973	4.458	3,6%
2008	671	5.477	6.148	4,5%
2009	575	7.133	7.708	5,4%
2010	738	7.369	8.107	5,8%
2011	1.113	9.896	11.009	7,3%
2012	1.559	12.073	13.632	8,9%
2013	1.472	6.345	7.817	5,3%
2014	1.225	7.301	8.526	6,0%
2015	1.250	6.584	7.834	5,7%
2016	1.134	6.045	7.179	5,9%
2017	956	5.611	6.567	6,0%
2018	828	4.414	5.242	4,9%
2019	832	3.205	4.037	4,1%
2020	536	2.541	3.077	4,4%
2021	505	2.244	2.749	3,9%
2022	493	2.046	2.539	6,5%
2023	541	2.234	2.775	13,7%
Table 23
Number of requests (success and fail) by type of requester
		2001		2002		2003		2004		2005		2006		2007		2008		2009		2010		2011		2012		2013		2014		2015		2016		2017		2018		2019		2020		2021		2022		2023
University libraries		99.383	57,0%	81.897	53,7%	67.246	49,8%	57.388	45,1%	44.867	40,0%	47.571	38,8%	45.834	36,7%	44.993	32,7%	42.670	30,1%	37.437	26,8%	36.273	23,9%	33.445	21,9%	32.121	21,9%	35.484	24,2%	31.425	22,6%	28.015	22,8%	22.859	20,4%	21.042	19,6%	18.090	18,2%	13.701	19,4%	13.341	18,9%	11.893	29,8%	11.710	55,9%
Corporate libraries		54.420	31,2%	35.777	23,5%	30.106	22,3%	22.559	17,7%	12.868	11,5%	10.831	8,8%	7.346	5,9%	8.041	5,8%	8.302	5,8%	7.235	5,2%	5.877	3,9%	3.610	2,4%	3.190	2,2%	3.677	2,5%	4.253	3,1%	4.508	3,7%	3.874	3,5%	2.282	2,1%	1.850	1,9%	1.527	2,2%	1.258	1,8%	1.296	3,3%	1.109	5,3%
Public libraries		6.977	4,0%	21.693	14,2%	26.424	19,6%	36.214	28,4%	43.449	38,7%	52.794	43,0%	58.060	46,5%	68.801	50,0%	73.753	52,0%	75.770	54,3%	88.315	58,2%	90.934	59,5%	92.784	63,4%	88.421	60,4%	85.556	61,4%	73.997	60,3%	70.487	62,9%	72.053	67,0%	68.667	69,1%	46.952	66,4%	47.938	68,0%	19.050	47,8%	349	1,7%
Government libraries		6.693	3,8%	5.568	3,7%	4.784	3,5%	4.533	3,6%	4.744	4,2%	5.175	4,2%	5.569	4,5%	6.050	4,4%	5.725	4,0%	6.130	4,4%	5.189	3,4%	4.996	3,3%	4.104	2,8%	3.557	2,4%	4.009	2,9%	3.406	2,8%	3.188	2,8%	2.624	2,4%	2.927	2,9%	2.334	3,3%	2.281	3,2%	2.172	5,5%	2.159	10,3%
Special libraries		3.517	2,0%	3.347	2,2%	3.117	2,3%	3.144	2,5%	1.607	1,4%	1.494	1,2%	1.385	1,1%	1.490	1,1%	1.569	1,1%	2.251	1,6%	3.022	2,0%	3.562	2,3%	3.477	2,4%	3.615	2,5%	3.235	2,3%	2.733	2,2%	2.525	2,3%	2.159	2,0%	1.905	1,9%	1.663	2,4%	1.374	1,9%	1.262	3,2%	1.017	4,9%
Other scientific libraries		2.338	1,3%	2.963	1,9%	2.193	1,6%	2.286	1,8%	3.102	2,8%	2.881	2,3%	4.458	3,6%	6.148	4,5%	7.708	5,4%	8.107	5,8%	11.009	7,3%	13.632	8,9%	7.817	5,3%	8.526	5,8%	7.834	5,6%	7.179	5,8%	6.567	5,9%	5.242	4,9%	4.037	4,1%	3.077	4,3%	2.749	3,9%	2.539	6,4%	2.775	13,3%
Schools for Higher Education		914	0,5%	1.152	0,8%	1.095	0,8%	1.251	1,0%	1.618	1,4%	1.917	1,6%	2.160	1,7%	2.047	1,5%	2.199	1,5%	2.501	1,8%	2.125	1,4%	2.666	1,7%	2.854	2,0%	3.149	2,2%	2.954	2,1%	2.906	2,4%	2.648	2,4%	2.202	2,0%	1.839	1,9%	1.508	2,1%	1.538	2,2%	1.632	4,1%	1.819	8,7%
Total		174.242	100,0%	152.397	100,0%	134.965	100,0%	127.375	100,0%	112.255	100,0%	122.663	100,0%	124.812	100,0%	137.570	100,0%	141.926	100,0%	139.431	100,0%	151.810	100,0%	152.845	100,0%	146.347	100,0%	146.429	100,0%	139.266	100,0%	122.744	100,0%	112.148	100,0%	107.604	100,0%	99.315	100,0%	70.762	100,0%	70.479	100,0%	39.844	100,0%	20.938	100,0%
Table 24
Number of requests (success) by type of supplier
		2001		2002		2003		2004		2005		2006		2007		2008		2009		2010		2011		2012		2013		2014		2015		2016		2017		2018		2019		2020		2021		2022		2023
University libraries		97.338	63,8%	77.634	59,1%	66.610	59,4%	56.621	52,3%	42.400	46,1%	43.297	42,1%	40.765	39,2%	44.617	37,8%	46.590	38,3%	43.278	36,1%	44.515	34,3%	43.341	33,2%	37.350	29,8%	38.512	31,4%	36.749	31,2%	34.129	32,8%	29.409	30,5%	24.420	26,4%	21.230	25,0%	16.042	27,0%	15.522	25,6%	14.475	43,0%	14.193	80,8%
Foreign document suppliers		31.678	20,8%	23.395	17,8%	17.439	15,6%	14.474	13,4%	9.133	9,9%	9.757	9,5%	8.229	7,9%	7.697	6,5%	5.341	4,4%	3.917	3,3%	2.034	1,6%	909	0,7%	807	0,6%	470	0,4%	429	0,4%	397	0,4%	283	0,3%	272	0,3%	59	0,1%	-	-	-	-	-	-	-	-
Fax suppliers		3.922	2,6%	2.441	1,9%	1.695	1,5%	1.458	1,3%	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Public libraries		4.815	3,2%	16.856	12,8%	20.640	18,4%	30.653	28,3%	34.200	37,2%	42.971	41,7%	47.858	46,0%	58.306	49,4%	62.338	51,2%	64.839	54,1%	75.691	58,2%	78.890	60,4%	79.798	63,7%	75.698	61,6%	73.068	62,1%	62.820	60,4%	61.033	63,3%	62.655	67,9%	59.427	69,9%	40.009	67,3%	41.665	68,7%	16.226	48,2%	201	1,1%
Other types of libraries*		14.757	9,7%	11.057	8,4%	5.763	5,1%	5.153	4,8%	6.309	6,9%	6.900	6,7%	7.219	6,9%	7.487	6,3%	7.520	6,2%	7.735	6,5%	7.723	5,9%	7.420	5,7%	7.296	5,8%	8.119	6,6%	7.356	6,3%	6.695	6,4%	5.722	5,9%	4.992	5,4%	4.307	5,1%	3.384	5,7%	3.452	5,7%	2.967	8,8%	3.173	18,1%
Total		152.510	100,0%	131.383	100,0%	112.147	100,0%	108.359	100,0%	92.042	100,0%	102.925	100,0%	104.071	100,0%	118.107	100,0%	121.789	100,0%	119.769	100,0%	129.963	100,0%	130.560	100,0%	125.251	100,0%	122.799	100,0%	117.602	100,0%	104.041	100,0%	96.447	100,0%	92.339	100,0%	85.023	100,0%	59.435	100,0%	60.639	100,0%	33.668	100,0%	17.567	100,0%
* governmental libraries, corporate libraries; schools for higher education, special libraries; including EHC-Erfgoedbibliotheek endrik Conscience and KBR-Royal Library Albert I
Table 25
Success Ratio
Year	Article Success Ratio	Monograph Success Ratio	Overall Success Ratio
1992	86,4%	77,5%	82,0%
1993	88,9%	76,5%	85,3%
1994	90,1%	72,2%	86,2%
1995	89,8%	71,3%	86,7%
1996	89,6%	70,2%	86,9%
1997	91,5%	74,4%	88,5%
1998	91,9%	73,2%	88,6%
1999	92,4%	73,2%	89,4%
2000	92,0%	72,3%	89,0%
2001	91,4%	71,3%	87,4%
2002	90,8%	75,7%	86,1%
2003	90,3%	76,9%	85,3%
2004	88,6%	77,6%	83,5%
2005	88,1%	78,5%	82,7%
2006	89,1%	80,8%	84,3%
2007	87,7%	81,8%	84,1%
2008	88,4%	84,3%	85,9%
2009	88,7%	84,1%	85,7%			`
2010	87,2%	85,1%	85,8%
2011	85,4%	85,7%	85,6%
2012	83,8%	86,6%	85,8%
2013	84,2%	86,1%	85,7%
2014	84,9%	85,9%	85,7%
2015	85,7%	86,1%	86,0%
2016	87,3%	85,7%	86,1%
2017	88,1%	87,4%	87,5%
2018	86,2%	87,2%	87,0%
2019	85,8%	87,0%	86,8%
2020	84,5%	85,2%	85,1%
2021	85,8%	87,3%	87,1%
2022	86,8%	86,2%	86,4%
2023	87,7%	86,5%	24,0%