| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 8 |
0.4%
|
| 2 | 12 years old | 97 |
5.3%
|
| 3 | 13 years old | 451 |
24.8%
|
| 4 | 14 years old | 492 |
27.1%
|
| 5 | 15 years old | 359 |
19.8%
|
| 6 | 16 years old | 332 |
18.3%
|
| 7 | 17 years old or older | 76 |
4.2%
|
| Sysmiss | 4 |