| Year | Enrolled | Not Enrolled |
|---|---|---|
| 2005 | 14.0 | 15.0 |
| 2004 | 13.9 | 15.0 |
| 2003 | 13.8 | 14.9 |
| 2002 | 13.8 | 14.9 |
| 2001 | 13.8 | 14.8 |
| 2000 | 13.8 | 14.8 |
| 1999 | 13.8 | 14.9 |
| 1998 | 14.0 | 15.0 |
| 1997 | 14.0 | 14.9 |
| 1996 | 13.9 | 14.6 |
| 1995 | 13.6 | 14.7 |
| 1994 | 13.7 | 14.6 |
| 1993 | 13.8 | 14.3 |
| 1992 | 13.7 | 14.6 |
| 1991 | 13.5 | 14.8 |