| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 43 |
3.2%
|
| 2 | 12 years old | 278 |
20.7%
|
| 3 | 13 years old | 303 |
22.5%
|
| 4 | 14 years old | 268 |
19.9%
|
| 5 | 15 years old | 320 |
23.8%
|
| 6 | 16 years old | 119 |
8.8%
|
| 7 | 17 years old or older | 15 |
1.1%
|
| Sysmiss | 2 |