It should be needless to say that rape and unwanted sexual contact is just evil. Given the Federal data compiled by the Washington Post, reported sexual offense rates at colleges and universities in general appear to be somewhat below the national average of reported rapes and sexual assaults. The Bureau of Justice Statistics finds that the rate of rapes and sexual assaults nationally has dropped since 1994 from 5 per 1,000 women to 2.1 per 1,000 women in 2010.
The Federal data cited by the Post is reported as per 1,000 students (not just women) so it should be about doubled for comparison purposes, but by eyeball it seems in general that the college rates are below the BJS rate. There, however, are significant outliers like Reed College (9.62 per 1,000 students), Vassar (4.16) and Amherst (9.36).
Go here to see your Alma Mater's stats.