Contribution statistics from 1982 to 2014, 2015 and semesters of 2016:
by Country
by Country and Publication Country (articles)
Contribution statistics from 1982 to 2012, 2013 to 2016 and years of 2013, 2014, 2015 and 2016.
by Country and Year
by Cooperating Center and Year
Other statistics:
by Publication Year
by Publication Year and Type of Literature
by Publication Country and Year (articles)
by Publication Country and Year (articles full text)
by Publication Year and Language
by Type of Literature
by Language