| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 52 |
2.8%
|
| 2 | 12 years old | 277 |
15.1%
|
| 3 | 13 years old | 503 |
27.5%
|
| 4 | 14 years old | 508 |
27.8%
|
| 5 | 15 years old | 289 |
15.8%
|
| 6 | 16 years old | 115 |
6.3%
|
| 7 | 17 years old or older | 85 |
4.6%
|
| Sysmiss | 78 |