Yep, in the U.S I remember seeing re-runs of a 1970 show The Mary Tyler Moore Show. The plot is a 30 year old single woman moving to the city and becoming a strong, independent woman. The actress was already famous for playing a housewife in a sitcom from the early 60's.Recently acquired a Sky Q box, and can now stream old TV series. I'm currently watching season 1 of Swedish police drama Beck:
In an episode originally transmitted in the spring of '98, a 30-something woman laments the fact that her long term boyfriend has walked out on her, and she complains that men don't want a "strong, independent woman". Although that phrase is now almost parody, I thought it had only come into use recently - looks like the rot has been going on for a lot longer than we thought.