Women are 50% of rape victims, and 40% of rapists. That is in the general population and excludes prison rape. If you included that, men would be the majority of victims.

These figures are from the CDC's 2010 NISVS (National Intimiate Partner Sexual Violence Survey), although you won't find it in the executive summary. You have to look at the data tables. Here is a link to the NISVS: http://www.cdc.gov/violenceprevention/nisvs/specialreports.h...

The executive summary tells the usual story of rape being a male on female crime. There are 2 problems here. One is that they define rape as being penetrated against your will, and not being forced to penetrate (what a female rapist would do to a man). This erases female on male rape.

However, they did ask men if they had been forced to penetrate in the prior 12 months, and 1.1% of men surveyed reported that they had, and 80% of those had been attacked by a woman. 1.1% of women reported that they had been penetrated against their will in the prior 12 months, and 98% of those reported a male attacker.

So we have 50% of victims are male and 50% female. Of the 50% of male victims, 80%, or 40% of total victims, were raped by a woman.

So women are 40% of rapists. Here is a image of the data tables from the NISVS, with the relevant figured circled: http://imgur.com/a/aw0eU

And here is a link to show the number crunching on the CDC's data tables in more detail: http://www.genderratic.com/p/836/manufacturing-female-victim...

Earlier I said there were 2 problems with the executive summary. The second one is that the CDC looked at lifetime victimization, and prior 12 months victimization. Their figures for men as victims of rape (when you include being made to penetrate) are much lower than for women. In the executive summary, they use the lifetime stats to show women as the overwhelming majority of victims, and don't mention the prior 12 month numbers.

Why the disparity between lifetime victimization and prior 12 month? Lifetime stats will tend to underestimate the problem, because, over time, people tend to erase their memory of traumatic events as a survival mechanism.

From the analysis I linked above:

>Researchers into the field of traumatic memory recovery note that the longer the period of time a person is asked recall a traumatic event, the less likely they are to remember it. How this works is that surveys that ask about a traumatic event in the last six months get less false negatives than those that ask about a traumatic event in the last twelve months which, itself, gets considerably fewer false negatives than lifetime prevalence.

> For men this effect is even more pronounced.

> 16% of men with documented cases of sexual abuse considered their early childhood experiences sexual abuse, compared with 64% of women with documented cases of sexual abuse. These gender differences may reflect inadequate measurement techniques or an unwillingness on the part of men to disclose this information (Widom and Morris 1997).

>Only 16% of men with documented case histories of child sexual abuse disclosed that abuse on a survey intended to capture child sexual abuse. Sixteen percent of men compared to sixty-four percent of women.

>That amounts to a disclosure rate of child sexual abuse four times higher in women than in men.

>Is it any wonder that the CDC’s 2010 survey (correcting for their mis-categorization of female-on-male rape) found that 18.3% of women and 6.2% of men were victimized over their lifetimes?