| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 3 |
0.2%
|
| 2 | 12 years old | 149 |
10.4%
|
| 3 | 13 years old | 403 |
28%
|
| 4 | 14 years old | 451 |
31.4%
|
| 5 | 15 years old | 318 |
22.1%
|
| 6 | 16 years old | 95 |
6.6%
|
| 7 | 17 years old or older | 19 |
1.3%
|
| Sysmiss | 4 |