| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 286 |
8.8%
|
| 2 | 12 years old | 449 |
13.8%
|
| 3 | 13 years old | 490 |
15.1%
|
| 4 | 14 years old | 569 |
17.6%
|
| 5 | 15 years old | 545 |
16.8%
|
| 6 | 16 years old | 462 |
14.3%
|
| 7 | 17 years old or older | 441 |
13.6%
|
| Sysmiss | 184 |