That would be a much more useful figure. The only stats I can find are here[1] but it just lists the number of successful projects not how much was pledged to them.
I feel like there are lots of people making sure no project stops at 99%. I know I barely use KS, but even I've sorted by "ending soonest" before and watched a few projects make it safely over to 100%.
[1] https://www.kickstarter.com/help/stats