| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 41 |
1.9%
|
| 2 | 12 years old | 151 |
6.9%
|
| 3 | 13 years old | 378 |
17.2%
|
| 4 | 14 years old | 558 |
25.4%
|
| 5 | 15 years old | 481 |
21.9%
|
| 6 | 16 years old | 383 |
17.4%
|
| 7 | 17 years old | 153 |
7%
|
| 8 | 18 years old or older | 50 |
2.3%
|
| Sysmiss | 13 |