"Just 27% of companies were able to secure outside funding within one year. Ultimately, just 36% of accelerated companies since 2005 added to their seed and angel rounds."

"According to the New York Times, 72% of Y Combinator companies through 2012 raised money after their Demo Day, and the majority of these companies have raised increasingly larger rounds"

I'd be really interested to know what proportion of non-YC startups raised follow on funding. It seems like YC might be dragging the average up.