The "How many women are in your group?" question has no answer for "none" other than one that's kind of insulting.
I have had many women in my group at various points; at the moment I have none, but we just lost one a few months ago when she moved across the country, and another prospective female player got vetoed by one of the other players because she drives him batty with her insanity (everyone else in the group can totally see where he's coming from, even if we don't agree).
So there isn't an accurate answer for me on that one.