| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 64 |
3.6%
|
| 2 | 12 years old | 74 |
4.2%
|
| 3 | 13 years old | 189 |
10.6%
|
| 4 | 14 years old | 273 |
15.3%
|
| 5 | 15 years old | 393 |
22.1%
|
| 6 | 16 years old | 431 |
24.2%
|
| 7 | 17 years old or older | 357 |
20%
|
| Sysmiss | 49 |