What percentage of college students who abuse drugs and alcohol graduate college?

MSTRFLX: What percentage of college students who abuse drugs and alcohol graduate college?
I need to find out what percentage of college students who tend to abuse drugs and alcohol manage to graduate college. I’ve looked through many sources, but I’ve found nothing. Help?

Answers and Views:

Answer by Chuckles
I really doubt you will find such a statistic. Because the students who do abuse that drop out, the statistic would be “poor academic Performance” and often when a student does not return, no one knows why they do not return.