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Crossref Stats Page: Updated on May 13, 2021

MetaData Deposit
Total Records in Database125,094,590
Total Prefixes20,343
Number of Journals90,763
Number of Books1,583,410
Number of Conference Proceedings79,679
Number of Journal DOIs89,115,913
Number of Book DOIs19,751,190
Number of Conference DOIs6,846,838
Number of Components4,932,308
Number of Standards Titles418,172
Number of Standards DOIs328,852
Number of Databases57,626
Number of Database DOIs2,127,712
Number of Articles with References Deposited51,260,467
Number of Cited-By Links1,169,936,337
Number of DOIs with at least one cited-by link (UNDER CONSTRUCTION)0
Number of Journal Title Level DOIs 42,281
Number of Book Title Level DOIs 1,602,586
Number of ConfProc Title Level DOIs 50,580
Number of Dissertation Title Level DOIs 375,340
Number of Report Title Level DOIs 675,771
Number of Standards Title Level DOIs 328,287
Number of Database Title Level DOIs 31,793
Number of Unique DOIs with FundRef data 2,947,660

Monthly Deposit Data

MonthTotal Records
Added
Total Current
Deposits
Total BackFile
Deposits
Total Records
Updated
(2018)9,874,1177,617,9912,256,12639,854,067
(2019)11,118,4618,583,2982,535,16350,533,616
(2020)12,462,5449,986,0052,476,53945,287,268
Apr1,266,1511,056,746209,4053,795,720
May887,638776,319111,3193,292,255
Jun927,909803,147124,7623,299,087
Jul1,047,460834,077213,3833,126,547
Aug873,497757,483116,0143,594,187
Sep1,103,079886,336216,7434,817,711
Oct997,236855,383141,8534,543,142
Nov1,062,042886,381175,6613,539,017
Dec1,371,421859,514511,9074,895,536
Jan1,044,509813,429231,0804,375,380
Feb969,590813,687155,9034,338,423
Mar1,283,413944,477338,9365,327,406
Apr1,055,832807,704248,1286,289,466
May352,492309,98442,5081,827,008


Monthly Query Data

MonthTotal MetaData
Queries
Total Matches%% by group
( Lib Pub Aflt )
Total DOI
Queries
Total Matches %
(2018)2194087319754,970,92334%51%43%43%1,823,393,3791,738,885,21895%
(2019)1,656,796,256783,711,58547%53%51%51%1,848,492,2611,716,370,97493%
(2020)1,523,069,914710,874,30447%48%49%49%1,590,084,0451,472,849,57693%
Apr163,869,67260,700,02737%53%47%76%148,994,557137,748,84292%
May143,139,28463,945,82845%51%44%78%141,096,791123,061,48387%
Jun147,525,80665,279,79544%50%43%74%124,779,394115,747,95293%
Jul131,115,28853,047,04940%47%40%67%122,865,216113,416,05792%
Aug142,863,13358,173,66241%48%48%70%116,270,019107,984,50493%
Sep123,549,99153,716,33243%48%53%71%140,308,115132,193,10594%
Oct119,202,20356,468,55047%46%54%66%145,576,877135,433,72593%
Nov111,306,54754,660,27349%43%51%65%145,617,216135,673,31193%
Dec105,326,79357,244,36754%42%52%63%125,425,079116,414,04793%
Jan123,512,84966,697,94754%42%47%73%132,310,968123,986,37694%
Feb104,387,79352,993,71051%43%51%66%126,697,909119,941,82795%
Mar125,916,24665,210,08652%45%40%68%196,377,049188,252,07696%
Apr124,028,98866,543,22354%44%47%71%198,452,792189,377,57795%
May52,054,16726,632,88051%41%58%71%82,758,11479,289,61396%


Monthly ORCID Auto-Update Data

MonthAuthors Granting
Permission
Works Added to
Authors Records
Apr34,219154,632
May58,391197,824
Jun47,734199,486
Jul40,082197,785
Aug57,434211,201
Sep51,774217,345
Oct45,097213,521
Nov50,382212,989
Dec49,622219,210
Jan54,398231,651
Feb53,324230,211
Mar60,427280,862
Apr55,220242,060
May22,09895,975

ORCID Totals

StatisticTotal
Total orcid/article pairs11,130,901
Total unique orcids3,458,332
Total works pushed6,234,438
Authors granting1,704,857
Authors denying655,294
Authors not responding1,116,513