| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 39 |
1.2%
|
| 2 | 12 years old | 352 |
10.8%
|
| 3 | 13 years old | 783 |
24.1%
|
| 4 | 14 years old | 933 |
28.7%
|
| 5 | 15 years old | 715 |
22%
|
| 6 | 16 years old | 297 |
9.1%
|
| 7 | 17 years old or older | 131 |
4%
|
| Sysmiss | 64 |