only 12.4 percent of students in the EECS major at UC Berkeley are female
via Gender disparity in EECS persists | Dailycal.org.
Well-made clip on gender diversity in EECS at Berkeley.
Somewhat related, it is comforting to learn that gender is not a huge factor in the report titled Ph.D. Student Attrition in the EECS Department at the University of California, Berkeley. The following interpretation is interesting but not fully backed with data.
A possible interpretation of this result … career choices must fit into a larger picture. For men, it is more acceptable to segregate the two. Seymour observed this same phenomenon in a study of undergraduates: “young men… are more willing to place career goals above considerations of personal satisfaction. By contrast, young women show a greater concern to make their education, their career goals, and their personal priorities, fit coherently together.” Another important concept is the idea of the science “mold.” If there are no role-models, no women faculty within the academic mold that appear to enjoy the life graduate student women aspire to achieve, women will seek a career option in which it is easier to integrate career and personal goals.