Accurate statistics are impossible to obtain, due to the enormous number of unreported rapes/molestation which occur every day. Depending on the source, and how you define the terms, the best estimates are that up to 1 of 3 females, and 1 of 7 males, will be sexually assaulted at some point in their lifetime.
Speaking anecdotally, just about every female I’ve been very close friends with, and a surprisingly high number of men as well, have admitted to me that they were raped and/or molested at some point in their lifetime. There are others who I suspect have been assaulted, but they haven’t told me, nor have I asked. Offhand, I can’t think of a single woman who’s told me unequivacolly that they’ve NEVER been assaulted; there’s no doubt they exist, but it’s not a question you’d ever ask anyone, even your most intimate friends.
The vast majority of rape victims (both adult and child) actually know their abusers. Often, it’s a very close friend and/or relative; someone they had no valid reason to fear, until it was too late. It’s a violation of trust, of the highest possible magnitude.