If we count phone I’d guess 40
While I won't give exact numbers, because I did not keep notes, I can give a relative answer.
I can, without bragging, say that it happened for 100% of those whom I had sex with multiple times, not always on the first time, but on the second or third time, as we both let go. (And from then on, it was because of an external factor if it didn't happen.)
As far as one night stands, one time intercourse, were concerned, I'd say I'm sure I did for 50% of them, I can't rule out simulation for another 10%, and I know I didn't for the remaining 40%. But I would attribute those "fails" more to nervousness keeping them from letting go, a certain lack of communication (being too shy to let me know if I didn't do the right thing) and not knowing each other's body enough, because I did try my best. 😜
And I'll add that in over 30% of these one time things, regardless of succeeding to make them come, I didn't come for the same reasons I listed for them (and a few times because of personal turn-offs).