Having been falsely accused of rape, and knowing others who have been as well, I'd put it closer to 99% of the "unreported" rape is women seeking attention, and at least 50% of the reported rapes as false accusations.
When there's no physical evidence of a rape, and it's reported, the justice system leans on the side of "the rape was real," even though it comes down to a he said/she said situation.
I'm not talking about some shitskin beating a woman and forcing himself on her.
I'm talking about Johnny Hot Cock fucking Sandra Saggy Tits, and Sandra saying it was rape the next day/week. Dudes have been convicted of rape with ZERO physical evidence.
One conviction, dude takes a chick into the backseat, they start fucking, she consented to the fucking, that's undisputed, both parties said that happened. She said that she told him to stop, he said that happened too.
He said he stopped.
She said he didn't.
Both said that he didn't climax.
He was convicted of rape.
Many such cases.