That stat seems a little off to me. Look at it from the flip side...if that many women are being raped abused or assaulted, that means there are that many rapists, abusers, and assaulters, or even a smaller but still unlikely percentage of guys who do it multiple times. Times have changed and I just don't think there are that many warped guys out there anymore...but maybe I'm naive.
(I'm not calling anyone a liar, but I do think if someone is disclosing something like that early on to a guy, unless it was directly relevant to the conversation, they are looking for sympathy)