Upvote:1
Well, this is not a good source, but you might want to read "Fall of Gigants" by Ken Follett, a novel based on sources, which refers to the subject you are interesting in.
By logic, this (feminization of industry) could never drop to rate as of 1914. The main reason was than many men died or was much injured. Not only because of lack of male workers, but also lack of male heads-of-families.
I can't find any numbers, but if I do, I'll update the answer.