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Crossref Stats Page: Updated on May 23, 2022

MetaData Deposit
Total Records in Database135,551,028
Total Prefixes23,534
Number of Journals103,743
Number of Books1,722,019
Number of Conference Proceedings89,744
Number of Journal DOIs95,521,774
Number of Book DOIs21,729,110
Number of Conference DOIs7,367,194
Number of Components5,621,745
Number of Standards Titles445,885
Number of Standards DOIs356,443
Number of Databases59,040
Number of Database DOIs2,400,910
Number of Articles with References Deposited56,064,701
Number of Cited-By Links1,327,927,959
Number of DOIs with at least one cited-by link (UNDER CONSTRUCTION)0
Number of Journal Title Level DOIs 48,117
Number of Book Title Level DOIs 1,748,406
Number of ConfProc Title Level DOIs 56,692
Number of Dissertation Title Level DOIs 512,583
Number of Report Title Level DOIs 716,521
Number of Standards Title Level DOIs 355,878
Number of Database Title Level DOIs 43,650
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
(2019)11,118,4618,583,2982,535,16350,533,616
(2020)12,462,5449,986,0052,476,53945,287,268
(2021)12,985,66110,349,5432,636,11851,337,993
Apr1,055,832807,704248,1286,289,466
May1,041,893837,705204,1884,464,162
Jun1,235,370898,842336,5284,692,713
Jul972,424847,497124,9273,075,538
Aug959,029783,767175,2625,030,489
Sep998,798835,853162,9453,324,506
Oct1,163,782865,453298,3293,467,668
Nov1,237,1411,001,453235,6883,649,436
Dec1,023,880899,676124,2043,302,806
Jan1,130,237867,853262,3843,488,628
Feb1,007,791795,827211,9643,300,538
Mar1,097,476905,802191,6744,290,807
Apr930,495801,651128,8443,582,107
May666,104573,56792,5372,240,215


Monthly Query Data

MonthTotal MetaData
Queries
Total Matches%% by group
( Lib Pub Aflt )
Total DOI
Queries
Total Matches %
(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%
(2021)1,409,971,973737,322,61052%42%52%52%2260129170215223692795%
Apr124,028,98866,543,22354%44%47%71%198,452,792189,377,57795%
May130,660,01366,041,06551%42%54%71%198,853,578190,416,45596%
Jun122,989,67562,671,87951%41%49%66%154,723,660146,989,47495%
Jul116,492,08758,235,66050%41%55%74%155,005,627144,467,45293%
Aug124,399,06266,887,68154%43%51%72%160,011,733151,249,44895%
Sep110,966,88158,299,46853%43%59%71%266,494,876257,252,94797%
Oct110,316,91255,204,67350%41%57%72%234,254,710224,459,97896%
Nov108,285,73758,408,11454%41%57%74%210,268,039199,826,26795%
Dec108,015,73060,129,10456%42%57%71%226,678,229216,017,05095%
Jan108,879,60861,714,03057%43%57%74%219,305,747209,041,49295%
Feb106,289,64259,283,79956%42%59%73%230,170,662220,917,17296%
Mar109,234,35558,028,53253%41%62%68%253,028,591243,613,48596%
Apr97,773,24950,608,12452%41%62%68%245,241,400236,291,04996%
May78,426,09441,931,89053%39%56%69%154,654,836147,853,19096%


Monthly ORCID Auto-Update Data

MonthAuthors Granting
Permission
Works Added to
Authors Records
Apr53,593242,060
May58,354255,426
Jun79,411301,041
Jul73,687292,899
Aug70,047280,966
Sep71,394294,529
Oct66,408292,127
Nov66,867306,087
Dec54,050284,648
Jan53,928256,790
Feb60,037300,793
Mar54,883314,306
Apr56,416272,069
May39,197202,608

ORCID Totals

StatisticTotal
Total orcid/article pairs16,020,937
Total unique orcids4,518,721
Total works pushed9,792,754
Authors granting2,480,171
Authors denying713,070
Authors not responding1,343,455