| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 126 |
5.8%
|
| 2 | 12 years old | 274 |
12.7%
|
| 3 | 13 years old | 363 |
16.8%
|
| 4 | 14 years old | 487 |
22.6%
|
| 5 | 15 years old | 391 |
18.1%
|
| 6 | 16 years old | 295 |
13.7%
|
| 7 | 17 years old or older | 219 |
10.2%
|
| Sysmiss | 20 |