It's not something we have looked up. Like Rob, I would guess it's very close to 100%. 10s would be represented in our top 100 lists and there was a recent article about our 2002 top 100 list. I believe 95 of the top 100 were drafted and all listed in the top 100 were not graded 10 (not enough 10s). Maybe we will have our tech guys do some research on that.
For those 10s that weren't drafted, it wouldn't be on account of their ability. However, injuries, makeup, other sports, along with some other things, can impact the draft.