I think D.A. Nifong answered this question. He said 75% of rape cases don't have DNA. 75% of rape cases are probably just that, "he said, she said"
So when you extrapolate the numbers,
In the FBI's Behavioral Science Unit's study of False Allegations conducted in 1983 of 556 rape investigations, a total of 220 (40%) of these reported rapes turned out to be false. Over one fourth of these 556 turned out to be hoaxes
http://www.anandaanswers.com/pages/naaStats.html
In 1995, 354,670 women were the victims of a rape or sexual assault.
http://www.wseg.org/rape.htm
141868 were of these reported rapes would be false. You might think there is quite a bit of hysteria involved in the reporting of rape. But then you need to keep in mind the number of men serving time in prison for rape. Of the men serving time in prison, pre-DNA testing era, 35% were innocent. Of that 35%, 25% of those were raped in prison.
Prison rape, being actually the MOST under reported form of rape.
According to Stephen Donaldson, president of Stop Prison Rape, more than 290,000 male prisoners are assaulted each year. Prison rape, says Donaldson in a New York Times opinion piece, "is an entrenched tradition." Donaldson, who was himself a victim of prison rape twenty years ago when he was incarcerated for antiwar activities, has calculated that there may be as many as 45,000 rapes every day in our prison population of 1.2 million men. The number of rapes is vastly higher than the number of victims because the same men are often attacked repeatedly. Many of the rapes are "gang bangs" repeated day after day. To report such a rape is a terribly dangerous thing to do,
http://www.leaderu.com/real/ri9502/sommers.html
You would think there would be a huge outcry from all of the women's groups about prison rape. At least a little sympathy for those who have been victims of the same violent sexual assault they cry out against so much. But sadly there is not.
For the feminist perhaps it is liken a Freudian slip of admission of guilt. They know the truth of the amount of false claims of rape and suspect the same in the case of male prison rape. All to often, the feminist will claim, "You have know way of knowing what it is like"
To them I say ponder this for a moment. In San Quentin prior to the reinstatement of capitol punishment, there were 265 executions. During the 20 or so years of the moratorium on capitol punishment there were over 3000 murders. When these men say in fear for their life they have reason to do so.
Of the number of men raped in prison, I wonder just how many are serving time for a false accusation of rape