If you wish, you can find these exact figures on the internet if you wish to spend the time tracking them down. I am trying to save you the trouble, as I've seen enough of them to know that my figures are pretty close to actual.
The "big" programs in college hockey also graduate players well. While the Ivies may be highest at 90-100% graduation rates, the major hockey powers tend to graduate 75+%, which is still very healthy, and tends to be above their all-student graduation rates. The net-net of all this is that college hockey has a very healthy balance of academics and hockey, unlike some of the larger NCAA sports.
For example, my school, Denver, was ranked #1 or #2 most of the season on the ice with 13 NHL draft picks. You might think these guys wouldn't care about school, but that's simply not the case. DU had 19 of its 21 eligible players (freshmen aren't eligible for all WCHA academic honors) above a 3.0 for all WCHA academic honors (broke a league record, also set by Denver last year with 17), and about 5 of them above a 3.5 GPA. They aren't majoring in corporate fitness, either. Almost all of them were in the College of Business, which is no easy picnic academically. Not all major hockey powers have this kind of academic emphasis, but college hockey schools are not churning out functional illiterates, either. Colleges graduate players that are well prepared for life after hockey, and turn out student-athletes who can compete very well in all areas.
The overall point here is that if you want to find athletes who are in academic trouble, you won't find very many of them in college hockey. We're doing fine in the classroom.