We don't know ourselves yet, because it takes so long for startups to exit. But we have a decent idea how many are successful at the next stage after YC-- the number who are either able to raise more after YC, or don't need to because they're profitable (or in very rare cases acquired). I think for the winter 2010 batch the percentage was in the low to mid 80s.
Incidentally, I wouldn't want it to be much higher. If it was 100%, it would mean we were picking too conservatively.
Incidentally, I wouldn't want it to be much higher. If it was 100%, it would mean we were picking too conservatively.