| Type of Institution | Cohort Group | |||
| 2008 | 2009 | 2010 | 2011 | |
| Research | 6 | 9 | 5 | 6 |
| Comprehensive | 6 | 5 | 5 | 4 |
| Liberal Arts | 0 | 0 | 7 | 3 |
| Community College | 1 | 1 | 1 | 1 |
| Professional School | 0 | 0 | 1 | 2 |
| Other | 0 | 0 | 1 | 0 |
| Total | 13 | 15 | 20 | 16 |