| Fall 2004 | Winter 2005 | Summer 2005 | ||||
| Age | n | % | n | % | n | % |
| 16 | 3 | 0% | 6 | 0% | ||
| 17 | 113 | 1% | 56 | 0% | 157 | 2% |
| 18 | 1,894 | 16% | 1,302 | 11% | 985 | 12% |
| 19 | 1,336 | 12% | 1,450 | 13% | 1459 | 17% |
| 20 | 1,446 | 13% | 1,451 | 13% | 1177 | 14% |
| 21 | 1,567 | 14% | 1,750 | 15% | 1058 | 13% |
| 22 | 1,566 | 14% | 1,614 | 14% | 1016 | 23% |
| 23 | 1,337 | 12% | 1,307 | 11% | 828 | 10% |
| 24 | 934 | 8% | 998 | 9% | 684 | 8% |
| 25 | 537 | 5% | 581 | 5% | 406 | 5% |
| 26 | 257 | 2% | 283 | 2% | 208 | 2% |
| 27 | 128 | 1% | 154 | 1% | 120 | 1% |
| 28 | 84 | 1% | 79 | 1% | 65 | 1% |
| 29 | 47 | 0% | 72 | 1% | 45 | 1% |
| 30 | 36 | 0% | 46 | 0% | 33 | 0% |
| 31 | 26 | 0% | 31 | 0% | 25 | 0% |
| 32 | 18 | 0% | 19 | 0% | 12 | 0% |
| 33 | 19 | 0% | 17 | 0% | 13 | 0% |
| 34 | 12 | 0% | 16 | 0% | 5 | 0% |
| 35 | 14 | 0% | 17 | 0% | 10 | 0% |
| 36 | 10 | 0% | 15 | 0% | 13 | 0% |
| 37 | 17 | 0% | 20 | 0% | 9 | 0% |
| 38 | 8 | 0% | 10 | 0% | 6 | 0% |
| 39 | 7 | 0% | 9 | 0% | 5 | 0% |
| 40 | 10 | 0% | 11 | 0% | 5 | 0% |
| 41 | 9 | 0% | 10 | 0% | 5 | 0% |
| 42 | 17 | 0% | 13 | 0% | 4 | 0% |
| 43 | 8 | 0% | 13 | 0% | 12 | 0% |
| 44 | 11 | 0% | 9 | 0% | 4 | 0% |
| 45 | 12 | 0% | 12 | 0% | 7 | 0% |
| 46 | 13 | 0% | 12 | 0% | 11 | 0% |
| 47 | 9 | 0% | 11 | 0% | 5 | 0% |
| 48 | 6 | 0% | 6 | 0% | 4 | 0% |
| 49 | 6 | 0% | 11 | 0% | 2 | 0% |
| 50 | 5 | 0% | 3 | 0% | 5 | 0% |
| 51 | 8 | 0% | 3 | 0% | 6 | 0% |
| 52 | 3 | 0% | 9 | 0% | 8 | 0% |
| 53 | 2 | 0% | 1 | 0% | 2 | 0% |
| 54 | 3 | 0% | 4 | |||