As shown by the following graph, the percentage of bachelor's degrees going to women in the US has increased over time in almost every major, with the dramatic exception of CS, which peaked in 1984 at 37%, then fell drastically, never to rise again above 20%.Why are the numbers for CS so different from every other field?This is relevant to CS education for those who want to make sure that students have equal opportunity regardless of gender.ClarificationSince some readers seem to have misunderstood my question, let me be explicit that I am not asking why fewer women than men study CS, nor do I mean to imply that people should not be free to change their own majors. I am asking why the proportion of CS bachelor's degrees in the United States going to women fell dramatically after 1984. 
Why did the percentage of CS bachelor's degrees going to women peak in 1984?
social context;equity