| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 299 |
6.5%
|
| 2 | 12 years old | 192 |
4.2%
|
| 3 | 13 years old | 631 |
13.7%
|
| 4 | 14 years old | 1578 |
34.3%
|
| 5 | 15 years old | 1141 |
24.8%
|
| 6 | 16 years old | 587 |
12.8%
|
| 7 | 17 years old or older | 170 |
3.7%
|
| Sysmiss | 129 |