Here's one of the studies I'm basing it on (this one is most in depth, but also only covers the Czech Republic):
https://link.springer.com/article/10.1007/s10508-010-9696-yI can drum up a couple more if you're looking for more data (the references in that study also contain a few).
My understanding is that, in addition to the Czech Republic, Canada, Croatia, Denmark, Germany, Finland, Hong Kong, Shanghai, Sweden and the USA have also been studied and have similar results.