Current Percentage of Green and Gold OA
Amsciforum 2013-03-10
Summary:
The percentage of total annual journal article output that is Green OA
has been hovering at about 15% for the past half decade at least. Here
are figures for Green OA only, for a Thomson/Reuters ISI sample of
21,000 control articles. Articles in Gold OA journals were excluded
from the count. Bo-Christer Björk's sample of 1282 Thompson/Reuters ISI articles, he
found much the same percentage Green (14%) but he also had an estimate
of Gold (6.6%). (Since ISI does not index all journals, Björk also
made an estimate for a total sample of 1837 ISI + nonISI journals, and
there the relative percentage for Gold was 8.5% and Green was 11.9%)