| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 230 |
10.2%
|
| 2 | 12 years old | 212 |
9.4%
|
| 3 | 13 years old | 503 |
22.4%
|
| 4 | 14 years old | 604 |
26.9%
|
| 5 | 15 years old | 440 |
19.6%
|
| 6 | 16 years old | 200 |
8.9%
|
| 7 | 17 years old or older | 59 |
2.6%
|
| Sysmiss | 108 |