| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 136 |
6%
|
| 2 | 12 years old | 210 |
9.2%
|
| 3 | 13 years old | 449 |
19.7%
|
| 4 | 14 years old | 486 |
21.4%
|
| 5 | 15 years old | 449 |
19.7%
|
| 6 | 16 years old | 384 |
16.9%
|
| 7 | 17 years old or older | 161 |
7.1%
|
| Sysmiss | 48 |