By way of anecdote, I have actually lost count of the number of female friends (and a couple of male friends - I do know the number there because it's rarer) who've disclosed to me that they've been raped.
Patriarchy, there will be women in your circle of friends/acquaintances who have been raped. A lot of them. But I can explain why your experience will be skewed.
Women rape victims in particular are used to not being believed. (There's a subtly different, but equally toxic set of social pressures on men not to disclose). So they won't open up to friends until they know them well. And all this time, they'll have been quietly and subconsciously noting the attitudes the person they're talking to expresses in public.
Laughs (even awkwardly) at rape jokes? Not safe to talk to. Tells rape jokes? Probably not even safe to be alone with, much less talk to. Dismisses #metoo as attention seeking? Not safe to talk to. Makes comments like "I fear for my sons, growing up in a world awash with false rape accusations"? Not safe to talk to. Says things like "Women need to take responsibility for how they dress"? Not safe to talk to. On hearing of rape case in the public eye, immediately speculates as to how much alcohol the victim had drunk? Not safe to talk to.
Women will spend often up to several years of relatively close friendship, reading your reactions to things, before they feel safe to disclose their past.
As soon as you say "I know several men falsely accused of rape", a victim of rape is going to think "What are the odds on that? Maybe this man's friends have just been incredibly unlucky, or maybe, in fact more likely [not saying this is actually the case with you, but this is how they will assess the situation] he's just a rape apologist... No way would I let him drag my traumatic experiences through his I'm just a man capable of rationally weighing the evidence here and deciding your experiences aren't actually as you describe filter."
I repeat, I'm not saying this is what you are like. But a woman who's been raped, hearing how you talk about your friends who have been falsely accused, isn't going to take that risk. Therefore you don't know any women who've been raped - because the ones who have won't take the risk on telling you.