FWIU Pitt has a very strong Co-Op program also, but it is not exclusively co-op. They push experiential learning via either co-op, internship or research. I believe 60% of the students do co-op.
South Dakota School of Mines & Technology reports that its students worked in internships and co-ops at more than 230 companies this year. Recruiters from 150 companies were on campus earlier this week for the Fall Career Fair. Those numbers are pretty good for a small university.