| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 29 |
1.6%
|
| 2 | 12 years old | 314 |
17%
|
| 3 | 13 years old | 324 |
17.6%
|
| 4 | 14 years old | 348 |
18.9%
|
| 5 | 15 years old | 282 |
15.3%
|
| 6 | 16 years old | 398 |
21.6%
|
| 7 | 17 years old or older | 151 |
8.2%
|
| Sysmiss | 11 |