| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 148 |
6.8%
|
| 2 | 12 years old | 481 |
22.1%
|
| 3 | 13 years old | 476 |
21.8%
|
| 4 | 14 years old | 551 |
25.3%
|
| 5 | 15 years old | 362 |
16.6%
|
| 6 | 16 years old | 122 |
5.6%
|
| 7 | 17 years old or older | 41 |
1.9%
|
| Sysmiss | 99 |