Well, there is a PF forum. I suspect if you put this poll up there you might see the result you'd expect.Interesting that 4e seems to be (slightly) in the lead in the poll. It's not my cup of tea; I was certain that 3.x would far outpace the others. My own vote is 3.5 although I'm almost completely over to 5e these days.
BTW, I'm curious why you play 5e rather than 3.5 or PF?