* Rates of women in Computer Science jobs.
* The number (not just %) of women studying computer science. Did those numbers fall, or stay the same? Was it just that more men entered the field of Computer Science?
My hunch (clearly not backed by any data) is that prior to the mid 80's, Computer Science was a niche field, so there weren't many people who went into CS.
As CS jobs became more mainstream (given the advent of the personal computer) more men went into Studying CS, instead of other fields they had been in. With more men studying CS, more men ended up in CS jobs, and eventually you end up with male dominance.
I would love to compare these rates, with what were the top engineering/science jobs in those times, and see of there is a correlation between the decrease in manufacturing/engineering, and the increase in Computer Science jobs.
Perhaps it's also cause and effect. There were more medical and legal jobs, so women entered those professions, and were able to fight to get equality. Since CS was relatively new, the barriers that women face hadn't been knocked down. As time goes on, there were more female doctors and lawyers for girls to have as role models, leading to more women studying in those fields.