| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 42 |
2.3%
|
| 2 | 12 years old | 63 |
3.4%
|
| 3 | 13 years old | 249 |
13.4%
|
| 4 | 14 years old | 402 |
21.7%
|
| 5 | 15 years old | 456 |
24.6%
|
| 6 | 16 years old | 431 |
23.2%
|
| 7 | 17 years old or older | 212 |
11.4%
|
| Sysmiss | 89 |