| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 313 |
9.4%
|
| 2 | 12 years old | 468 |
14.1%
|
| 3 | 13 years old | 491 |
14.8%
|
| 4 | 14 years old | 545 |
16.4%
|
| 5 | 15 years old | 563 |
16.9%
|
| 6 | 16 years old | 486 |
14.6%
|
| 7 | 17 years old | 323 |
9.7%
|
| 8 | 18 years old or older | 139 |
4.2%
|
| Sysmiss | 5 |