| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 78 |
4%
|
| 2 | 12 years old | 159 |
8.1%
|
| 3 | 13 years old | 480 |
24.5%
|
| 4 | 14 years old | 483 |
24.7%
|
| 5 | 15 years old | 428 |
21.9%
|
| 6 | 16 years old | 189 |
9.7%
|
| 7 | 17 years old or older | 140 |
7.2%
|
| Sysmiss | 12 |