~321,183 rapes go unreported per year.
We know that 310 of 1,000 rapes get reported (RAINN).
And that there were 144,300 reports of rape in America last year.
So, 690 out of every 1,000 rapes go unreported.
Last year, 144,300 (310 of 1,000) rapes got reported.
That means that there are 465,483 rapes that happen per year.
465,483 – 144,300 = 321,183 rapes that go unreported a year.
465,483 x 69% = 321,183 unreported rapes.