Dramatic growth of Open Access - some statistics

From The Imaginary Journal of Poetic Economics blog

... a few key quotable numbers to illustrate the growth and current extent of open access: more than 4,000 fully open access, peer reviewed journals in DOAJ, growing by 2 titles per day; close to 1,500 open access repositories listed in OpenDOAR, adding a new repository every business day; over 30 million free publications through Scientific Commons, growing by more than 20 thousands items per day; more than 20% of the world's medical literature is freely available 2 years after publication, and close to 10% is freely available immediately on publication; 1 more journal decides to submit all or most content to PMC every business day, and growth of open access journals in PMC is one new journal every other business day. The number of open access mandate policies is well over a hundred, and growing rapidly - but also likely understated. If you have a policy, please be sure to register with ROARMAP. This quarter saw some minor setbacks. Most notable (but still small) is a decrease in free content through Highwire Press