| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 85 |
4%
|
| 2 | 12 years old | 393 |
18.6%
|
| 3 | 13 years old | 495 |
23.4%
|
| 4 | 14 years old | 480 |
22.7%
|
| 5 | 15 years old | 426 |
20.1%
|
| 6 | 16 years old | 211 |
10%
|
| 7 | 17 years old or older | 28 |
1.3%
|
| Sysmiss | 43 |