A fascinating analysis (and interactive vis) put together by the team at Eigenfactor, analysing around two million articles from the JSTOR corpus, representing 1765 fields and sub-fields, were examined, spanning a period from 1665 to 2011. The data looks at hard sciences, the social sciences, law, history, philosophy, and education, with a noticeable gap in coverage of engineering, physics and some foreign languages. 

Do have a look. 

Women as Academic Authors, 1665-2010 | The Chronicle of Higher Education