Monday, December 31, 2018

2018: best year yet for net growth of open access

Highlights: this edition of the Dramatic Growth of Open Access features charts that illustrate that 2018 showed the strongest growth to date for open access by number of documents searchable through BASE, PubMedCentral, arXiv, DOAJ, texts added to Internet Archive, and journals added to DOAJ.


A Bielefeld Academic Search Engine (BASE) search encompasses over 19 million more items at the end of 2018 - about 60% or 11.4 million are open access. This brings the total documents searchable through BASE to close to 140 million (about 84 million open access)


PubMedCentral added 600,000 items in 2018, and surpassed a milestone of 5 millions items this year (now 5.2 million items)











arXiv added 140,000 items in 2018, bringing the total close to 1.5 million items.











The DOAJ article search grew by more than 800,000 articles in 2018, bringing the total number of articles searchable through DOAJ to about 3.6 million.









2018 was also the best year to date for DOAJ net journal growth. 1,707 journals were added for a current total of over 12,000 journals. Negative growth in 2016 illustrates the impact of the DOAJ weeding / re-application process.








4.5 million more texts are available through Internet Archive, bringing the total close to 20 million.










The following table provides data on total number of items as of December 31, 2018, growth in 2018 by number and percentage, in descending order by growth in percent. In interpreting percentage growth, consider total and numeric growth. bioRxiv nearly doubled in size this year, indicating a fairly new but healthy and rapidly growing service; but this reflects growth of about 20 thousand documents, a small fraction of the 600,000 items added by PMC for a 13% growth rate.

2018 growth (percent)   2018 total 2018 growth (number)
110% bioRxiv # articles  39,570 20,748
74% Internet Archives software 346,320 147,320
39% SCOAP3 # article 25,163 7,121
30% Internet Archive texts 19,570,789 4,570,789
30% DOAJ searchable articles 3,624,154 832,453
29% Internet Archive audio (recordings) 4,909,271 1,109,271
28% DOAB # books 13,253 2,938
25% Internet Archive collections 389,778 76,778
24% Internet Archive videos (movies) 4,701,129 901,129
21% DOAJ journals searchable at article level 9,479 1,670
16% PubMed keyword search: cancer- last year - free fulltext 65,766 9,154
16% DOAJ # journals 12,434 1,707
16% BASE # documents 139,476,029 19,092,606
16% Internet Archives television 1,733,000 233,000
15% DOAB # publishers 285 38
14% PMC journals some articles OA 758 94
13% PMC # items 5,200,000 600,000
13% RePEC books 39,086 4,449
12% RePEc journal articles 1,785,335 193,994
12% PubMed keyword search: cancer- last 2 years - free fulltext 153,875 16,026
11% BASE # content providers 6,732 694
11% Internet Archive webpages (in billions) 345 35
11% RePEC online (fulltext) (downloadable as of March 2012) 2,528,831 249,692
11% PubMed keyword search: cancer- last 5 years - free fulltext 391,691 37,230
10% arXiv  http://arxiv.org/  1,482,864 140,139
10% OpenDOAR http://www.opendoar.org/ # repositories 3,799 335
9% RePEC chapters 51,278 4,360
9% PMC journals selected articles 4,908 414
8% RePEc working papers 858,360 64,235
8% Total Policies (ROARMAP) 960 71
8% PubMed keyword search: cancer - free fulltext 1,027,541 75,655
7% PMC journals immediate free acccess 1,964 132
7% DOAJ # countries 129 8
7% PubMed keyword search: cancer - last year - all results 184,024 11,341
6% PMC journals deposit all articles 2,217 124
6% Elektronische Zeitschriftenbibliotek - Electronic Journals Library  # journals that can be read free of charge 62,681 3,441
5% PubMed keyword search: cancer - last 5 years - all results 839,960 43,565
5% PMC journals actively participating 2,578 132
5% PubMed keyword search: cancer - all results 3,784,638 192,126
5% PubMed keyword search: cancer - last 2 years - all results 357,370 17,970
4% RePEc software components 4,206 178
4% Internet Archive live music (concerts) 192,534 7,534
3% PMC journals all articles OA 1,529 51
3% ROAR # repositories 4,735 138
2% PMC journals NIH portfolio 335 6
-12% Internet Archive images 3,247,253 -452,747


Full data can be downloaded from the Dramatic Growth of Open Access dataverse: https://hdl.handle.net/10864/10660. This post is part of the Dramatic Growth of Open Access series. From 2004 - June 30, 2018 the series was posted on a quarterly basis. As of September 30, 2018, I continue to gather data quarterly but plan to release the series less frequently, most likely on an annual basis.

No comments:

Post a Comment

Thank you for your comment. Comments on IJPE are moderated.