| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 227 |
3.8%
|
| 2 | 12 years old | 440 |
7.3%
|
| 3 | 13 years old | 1237 |
20.6%
|
| 4 | 14 years old | 1187 |
19.8%
|
| 5 | 15 years old | 1284 |
21.4%
|
| 6 | 16 years old | 1024 |
17.1%
|
| 7 | 17 years old or older | 605 |
10.1%
|
| Sysmiss | 40 |