| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 72 |
3.1%
|
| 2 | 12 years old | 307 |
13.4%
|
| 3 | 13 years old | 418 |
18.2%
|
| 4 | 14 years old | 448 |
19.6%
|
| 5 | 15 years old | 572 |
25%
|
| 6 | 16 years old or older | 474 |
20.7%
|
| Sysmiss | 23 |