The June 30, 2010 issue of The Dramatic Growth of Open Access is now available for viewing or open data download.
Highlights this quarter:
Open access policy continues to be the headline growth story, particularly institutional OA mandates and total OA mandates, both of which have more than doubled over the past year. There are now a total of 220 mandates.
DOAJ is now over 5,000 journals - congratulations, DOAJ!! By my calculations, this means that about 20% of the world's peer-reviewed journals are now open access*. DOAJ title growth was particularly strong this quarter, 277 titles or an average of 3 titles per day (over the past year, 888 titles added, over 2 titles per day). In addition to title growth, DOAJ is showing growth in the number of titles and articles searchable at article level - the latter is now over 400,000.
BASE added about 1.5 million documents this quarter, or about half a million documents per month.
As reported by Bjork et al in PLoS One, about 1 in 5 articles published in 2009 are now freely available.
This is a brief version of DGOA so that I can get back to the LIBER 2010 Conference in beautiful Aarhus, Denmark as quickly as possible. For more, please see my Dramatic Growth of Open Access Series, where I often include links to highlights to other milestones and indicators of growth.
* Note that both traditional measures of peer-reviewed journals and OA counts are missing important data, such as numbers of journals from China. I would appreciate hearing from anyone who has ideas on how to address this.