| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 143 |
8.4%
|
| 2 | 12 years old | 541 |
31.9%
|
| 3 | 13 years old | 493 |
29.1%
|
| 4 | 14 years old | 396 |
23.4%
|
| 5 | 15 years old | 111 |
6.5%
|
| 6 | 16 years old | 10 |
0.6%
|
| 7 | 17 years old or older | 1 |
0.1%
|
| Sysmiss | 2 |