| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 54 |
3.2%
|
| 2 | 12 years old | 191 |
11.4%
|
| 3 | 13 years old | 409 |
24.5%
|
| 4 | 14 years old | 375 |
22.4%
|
| 5 | 15 years old | 379 |
22.7%
|
| 6 | 16 years old | 220 |
13.2%
|
| 7 | 17 years old or older | 43 |
2.6%
|
| Sysmiss | 1 |