| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 235 |
10%
|
| 2 | 12 years old | 384 |
16.3%
|
| 3 | 13 years old | 540 |
22.9%
|
| 4 | 14 years old | 504 |
21.4%
|
| 5 | 15 years old | 353 |
15%
|
| 6 | 16 years old | 196 |
8.3%
|
| 7 | 17 years old or older | 143 |
6.1%
|
| Sysmiss | 56 |