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To the dashboard of
Heritage Leiden and environsBelow is a multi-year overview of displays of data (certificates) and scans of Heritage Leiden and environs to web users on Open Archives.

Month	Viewed documents			Viewed scans
Month	with scan	without scan	Total	Viewed scans
2013-10	28,295	352	43,480	5,056
2013-11	47,034	513	72,309	5,156
2013-12	58,660	581	82,229	6,641
2013	133,989	1,446	198,018	16,853

Month	Viewed documents			Viewed scans
Month	with scan	without scan	Total	Viewed scans
2014-1	79,427	591	112,985	8,329
2014-2	66,025	8,607	94,202	6,699
2014-3	62,963	4,436	88,486	6,779
2014-4	58,835	549	83,340	5,780
2014-5	47,246	443	66,372	4,371
2014-6	47,035	430	65,783	5,366
2014-7	51,797	468	71,086	5,666
2014-8	60,443	515	79,059	6,686
2014-9	52,979	365	69,676	5,961
2014-10	71,398	418	93,730	8,239
2014-11	75,216	468	100,616	9,060
2014-12	67,490	384	89,176	8,671
2014	740,854	17,674	1,014,511	81,607

Month	Viewed documents			Viewed scans
Month	with scan	without scan	Total	Viewed scans
2015-1	72,704	442	96,615	8,629
2015-2	66,326	361	88,305	8,377
2015-3	63,686	338	85,236	7,772
2015-4	59,326	315	78,594	6,336
2015-5	62,974	321	84,018	6,151
2015-6	56,272	292	75,849	5,720
2015-7	52,826	302	71,584	5,170
2015-8	50,606	343	69,882	5,255
2015-9	55,033	316	73,596	5,424
2015-10	64,838	388	85,262	6,195
2015-11	61,831	411	81,714	5,071
2015-12	57,540	360	76,478	5,156
2015	723,962	4,189	967,133	75,256

Month	Viewed documents			Viewed scans
Month	with scan	without scan	Total	Viewed scans
2016-1	68,644	432	91,982	5,604
2016-2	72,163	482	94,999	6,047
2016-3	57,210	399	77,833	5,232
2016-4	46,455	375	62,693	4,397
2016-5	44,157	253	59,156	3,619
2016-6	41,290	281	54,420	3,142
2016-7	21,100	19,965	47,539	2,893
2016-8	23	46,576	46,605	3,119
2016-9	29,640	18,609	48,250	3,079
2016-10	39,870	14,640	54,510	3,244
2016-11	53,134	17,119	70,253	4,973
2016-12	52,782	16,003	68,785	4,604
2016	526,468	135,134	777,025	49,953

Month	Viewed documents			Viewed scans
Month	with scan	without scan	Total	Viewed scans
2017-1	58,895	17,254	76,149	4,883
2017-2	60,273	16,148	76,421	4,463
2017-3	63,309	16,730	80,039	5,020
2017-4	62,164	17,725	79,889	4,712
2017-5	54,698	17,941	72,639	3,612
2017-6	41,017	13,793	54,810	3,047
2017-7	51,301	15,031	66,332	4,048
2017-8	54,067	14,424	68,492	4,361
2017-9	57,507	15,445	72,952	4,183
2017-10	71,570	18,976	90,546	5,555
2017-11	75,225	18,796	94,021	5,469
2017-12	75,500	18,946	94,446	5,078
2017	725,526	201,209	926,736	54,431

Month	Viewed documents			Viewed scans
Month	with scan	without scan	Total	Viewed scans
2018-1	101,044	26,014	127,058	6,348
2018-2	87,853	21,809	109,662	836
2018-3	100,564	24,690	125,254	3,365
2018-4	83,670	21,399	105,069	5,720
2018-5	71,194	19,713	90,907	5,827
2018-6	63,487	16,527	80,014	5,259
2018-7	63,322	16,029	79,351	5,111
2018-8	84,012	22,667	106,679	6,727
2018-9	82,465	22,130	104,595	6,270
2018-10	88,573	23,932	112,505	7,121
2018-11	83,633	21,665	105,298	6,174
2018-12	78,644	20,430	99,074	5,816
2018	988,461	257,005	1,245,466	64,574

Month	Viewed documents			Viewed scans
Month	with scan	without scan	Total	Viewed scans
2019-1	99,380	25,190	124,570	6,548
2019-2	92,325	22,339	114,664	6,336
2019-3	105,835	23,911	129,746	6,772
2019-4	75,940	17,874	93,814	4,815
2019-5	86,689	20,295	106,984	5,010
2019-6	81,506	16,918	98,424	5,195
2019-7	66,373	14,250	80,623	4,923
2019-8	76,828	16,471	93,299	5,906
2019-9	77,939	15,650	93,589	5,432
2019-10	91,475	18,107	109,582	5,197
2019-11	92,907	19,429	112,336	5,878
2019-12	96,408	18,006	114,414	5,770
2019	1,043,605	228,440	1,272,045	67,782

Month	Viewed documents			Viewed scans
Month	with scan	without scan	Total	Viewed scans
2020-1	99,105	21,336	120,441	6,023
2020-2	95,775	18,460	114,235	6,204
2020-3	98,377	17,150	115,527	6,474
2020-4	107,520	19,744	127,264	7,204
2020-5	125,310	24,014	149,324	7,646
2020-6	102,562	19,080	121,642	5,998
2020-7	113,683	22,313	135,996	7,076
2020-8	110,613	22,175	132,788	6,311
2020-9	102,572	18,728	121,300	5,440
2020-10	112,551	21,203	133,754	5,982
2020-11	98,621	20,068	118,689	5,670
2020-12	94,500	18,617	113,117	5,808
2020	1,261,189	242,888	1,504,077	75,836

Month	Viewed documents			Viewed scans
Month	with scan	without scan	Total	Viewed scans
2021-1	137,313	25,122	162,436	8,390
2021-2	129,524	23,003	152,527	7,908
2021-3	115,619	21,405	137,024	6,994
2021-4	103,417	17,184	120,601	6,417
2021-5	100,909	18,016	118,925	6,278
2021-6	69,414	10,865	80,279	4,197
2021-7	75,821	11,976	87,797	5,038
2021-8	85,381	13,829	99,210	5,487
2021-9	67,759	11,114	78,873	4,188
2021-10	80,195	12,362	92,557	4,310
2021-11	87,984	13,119	101,103	5,090
2021-12	84,985	13,358	98,343	4,816
2021	1,138,321	191,353	1,329,675	69,113

Month	Viewed documents			Viewed scans
Month	with scan	without scan	Total	Viewed scans
2022-2	83,551	13,711	97,262	5,021
2022-3	84,074	14,956	99,030	4,895
2022-4	83,161	14,612	97,773	5,090
2022-5	68,712	12,078	80,790	4,266
2022-6	66,014	10,968	76,982	3,747
2022-7	74,443	12,163	86,606	4,434
2022-8	77,693	13,476	91,169	4,412
2022-9	78,648	13,042	91,690	3,925
2022-10	88,459	15,020	103,479	4,367
2022-11	84,397	13,586	97,983	4,538
2022-12	78,612	13,079	91,691	4,871
2022	867,764	146,691	1,014,455	49,566

Month	Viewed documents			Viewed scans
Month	with scan	without scan	Total	Viewed scans
2023-1	124,794	21,914	146,708	8,912
2023-2	143,212	92,032	235,244	7,873
2023-3	185,814	153,173	338,987	9,282
2023-4	135,329	26,639	161,968	7,624
2023-5	161,709	84,039	245,748	7,327
2023-6	107,279	24,802	132,081	6,054
2023-7	114,867	46,269	161,136	7,018
2023-8	739,168	503,882	1,243,050	7,612
2023-9	138,720	54,223	192,943	6,896
2023-10	152,017	123,848	275,865	8,022
2023-11	460,388	395,627	856,015	7,175
2023-12	403,759	247,738	651,497	105,714
2023	2,867,056	1,774,186	4,641,242	189,509

Month	Viewed documents			Viewed scans
Month	with scan	without scan	Total	Viewed scans
2024-1	315,494	76,552	392,046	179,149
2024-2	118,604	18,699	137,303	8,326
2024-3	115,368	18,100	133,468	11,418
2024-4	96,167	16,626	112,793	9,155
2024-5	121,821	25,579	147,400	8,593
2024-6	115,588	37,798	153,386	6
2024-7	123,138	35,285	158,423	330
2024-8	130,025	45,986	176,011	21
2024-9	292,293	209,891	502,184	27
2024-10	259,599	149,150	408,749	15
2024-11	141,801	49,668	191,469	22
2024-12	148,531	45,181	193,712	15
2024	1,978,429	728,515	2,706,944	217,077

Month	Viewed documents			Viewed scans
Month	with scan	without scan	Total	Viewed scans
2025-1	244,084	58,112	302,196	28
2025-2	299,666	103,376	403,042	1,005
2025-3	232,749	84,312	317,061	9,440
2025-4	232,024	77,653	309,677	10,833
2025	1,008,523	323,453	1,331,976	21,306

Until 2022, statistics were collected via Google Analytics, since 2023 no third-party services have been used to collect the statistics.

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