Young women under age 25.
After that age, not so much.
According to the National Crime Victimization Survey (2007 data), the rate of attempted or completed rape or sexual assault is:
Age Rate per 1000
16-19 4.9
20-24 5.9
25-34 2.4
35-49 1.8
50-64 0.3
65+ 0.2