| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 43 |
2.1%
|
| 2 | 12 years old | 171 |
8.2%
|
| 3 | 13 years old | 381 |
18.2%
|
| 4 | 14 years old | 467 |
22.3%
|
| 5 | 15 years old | 466 |
22.3%
|
| 6 | 16 years old | 338 |
16.2%
|
| 7 | 17 years old | 177 |
8.5%
|
| 8 | 18 years old or older | 49 |
2.3%
|
| Sysmiss | 29 |