Am I reading this correctly?

by Jeff (BGS) , A starter home in suburban Tempe, Monday, April 27, 2009, 16:15 (6239 days ago) @ FunkDoctorSpock

Of the Top 60:
- 20 are no longer in football (graduated, dropped out, injured, etc.)
- 23 were drafted by the NFL
- 17 are still playing in college

Of the Top 100:
- 38 are no longer in football (graduated, dropped out, injured, etc.)
- 32 were drafted by the NFL
- 30 are still playing in college

The reason I ask is that I find it interesting that this would mean a third of the Top-60/100 players coming out of high school aren't playing football four years later.