[Heyworth]

http://www.hrw.org/reports/2001/prison/report7.html#_1_44

Some stats for you. The problem is that, because of the nature of the crime and the interests in the authorities of minimizing them, accuracy is difficult to determine.

[Khepera]

I looked down the whole page and saw no figures. All I saw was apologies for why they had no figures to support claims of high rape rates or low rape rates.