Both sides are equally responsible here, and i have seen boys being put on sex offenders register for having sex with there girlfriend and she later decides she didn't like him or it didn't feel good so she dumps hims, tells daddy she he raped her to look like daddies little angel then happy sails on to the next boyfriend.
Anyone who actually did that, and carried it forward to the police etc. would lose a huge amount of respect from her friends and the people around her.
Not that i am saying there are not legitimate accusations as well but most certainly not in these numbers, if that were the case then my first time with my boyfriend would be classified as rape since he was 16 and i was 15. If we were caught that would have been seen as rape here since he was a legal adult at 16 and i was a child.
I don't believe anyone counts that as rape, and other the other side, the UK government think that only about 10% of real rapes are reported, so that in the UK there are around 250'000 real rapes/year, and the UK government figures are likely to be conservative.