| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 326 |
5.4%
|
| 2 | 12 years old | 493 |
8.2%
|
| 3 | 13 years old | 942 |
15.6%
|
| 4 | 14 years old | 1471 |
24.4%
|
| 5 | 15 years old | 1233 |
20.5%
|
| 6 | 16 years old | 849 |
14.1%
|
| 7 | 17 years old or older | 707 |
11.7%
|
| Sysmiss | 210 |