It goes back further than that. I would guess 20% back as far as early 80’s. We had an incoming freshman class that was 50% female - I believe it was in 1983. The following year the Sophomore class was once again in the 20-25% range. All that extra advertising just resulted in a lower than normal return rate. I’m tired of reading about how to increase the number of women in STEM. They have been playing that tune as long as I can remember.
I’ve never been harassed, but I have to admit that I have never been offered drugs either. My theory is that I give off an “I will turn you in” vibe causing people to not mess with me.