| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 26 |
2.5%
|
| 2 | 12 years old | 17 |
1.7%
|
| 3 | 13 years old | 14 |
1.4%
|
| 4 | 14 years old | 108 |
10.6%
|
| 5 | 15 years old | 285 |
27.9%
|
| 6 | 16 years old | 258 |
25.3%
|
| 7 | 17 years old or older | 313 |
30.7%
|
| Sysmiss | 36 |