> If we look at US numbers that actually not the case. As I wrote in an other comment, between 1940 and 1970 it doubled from around 25% to around 50%, but from 1970 to 2017 it only went up to current 55%. It actually went down from 2000 which topped at 59%.
Using the data source provided from the post I replied to (table P-36) the number of full time, year-round workers looks like this:
Men: 36.1M (1970) => 66.4M (2017) increase of 84%
Women: 15.5M (1970) => 44.4M (2017) increase of 186%
So within this group we went from ~30% female to ~40% female and I would venture that the types of employment accessible to women in this time frame has also expanded quite a bit, though I have no immediate data handy to back this up.
Without digging into your numbers, I suspect they may come from total labor force participation which is a notably different metric.
Using the data source provided from the post I replied to (table P-36) the number of full time, year-round workers looks like this:
Men: 36.1M (1970) => 66.4M (2017) increase of 84%
Women: 15.5M (1970) => 44.4M (2017) increase of 186%
So within this group we went from ~30% female to ~40% female and I would venture that the types of employment accessible to women in this time frame has also expanded quite a bit, though I have no immediate data handy to back this up.
Without digging into your numbers, I suspect they may come from total labor force participation which is a notably different metric.