| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 56 |
2.8%
|
| 2 | 12 years old | 244 |
12.4%
|
| 3 | 13 years old | 368 |
18.7%
|
| 4 | 14 years old | 375 |
19.1%
|
| 5 | 15 years old | 354 |
18%
|
| 6 | 16 years old | 362 |
18.4%
|
| 7 | 17 years old | 161 |
8.2%
|
| 8 | 18 years old or older | 45 |
2.3%
|
| Sysmiss | 5 |