| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 113 |
6.7%
|
| 2 | 12 years old | 120 |
7.1%
|
| 3 | 13 years old | 157 |
9.4%
|
| 4 | 14 years old | 206 |
12.3%
|
| 5 | 15 years old | 297 |
17.7%
|
| 6 | 16 years old | 296 |
17.6%
|
| 7 | 17 years old or older | 490 |
29.2%
|
| Sysmiss | 60 |