| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 75 |
3.7%
|
| 2 | 12 years old | 348 |
17%
|
| 3 | 13 years old | 661 |
32.3%
|
| 4 | 14 years old | 646 |
31.6%
|
| 5 | 15 years old | 223 |
10.9%
|
| 6 | 16 years old | 71 |
3.5%
|
| 7 | 17 years old or older | 21 |
1%
|
| Sysmiss | 87 |