I have a different article for you that you might want to consider.   Remember this, if you think rape of women is under reported, then rape of men is extremely under reported and even more so if you consider men being raped by women.  Remember the stereotype is that men are supposed to love having sex in all situations.  If it is rape for a guy to have sex with a drunk or unconscious woman, should not the reverse be true?  In other words should it not be true that for a woman to have sex with a drunk or unconscious man?  Like I said these type of rapes are extremely under reported.   Most rape statistics do not include this type of rape.  Biblical trivia here, can you tell me if the Bible gives an example of women raping a man like I have just described?
http://www.vocativ.com/underworld/crime/hard-truth-girl-guy-rape/