| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 124 |
6.1%
|
| 2 | 12 years old | 222 |
10.9%
|
| 3 | 13 years old | 505 |
24.8%
|
| 4 | 14 years old | 439 |
21.5%
|
| 5 | 15 years old | 451 |
22.1%
|
| 6 | 16 years old | 269 |
13.2%
|
| 7 | 17 years old or older | 29 |
1.4%
|
| Sysmiss | 70 |