I've been involved in doing some research in putting together a rape prevention program to be presented to local colleges and Univ. There is more very clear data that puts more light on the subject.  Over 80% of college age females who report a rape were victim's of somebody they know. These events occur when  they are involved in risky behavior.  As a retired police officer of 25 years, it's sad but a fact close to 4 out of 5 rape reports end up as untrue or there is absolutely no evidence to prove rape that could be taken to a prosecutor. According to Federal reported crime statistics college age persons have a 7:1000 chance of rape and sexual assault. Thus rape is less than 3:1000, every year. Actually the reports of rape have been going down every year since the 1990's. This may have to do with our new "hook-up" culture that is even being embraced by more and more young females. I could see that most of those reports will be freshman. I'm involved on working had to put together a program to drive that number to almost zero.
Dan B.