| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 447 |
9.6%
|
| 2 | 12 years old | 499 |
10.7%
|
| 3 | 13 years old | 1469 |
31.6%
|
| 4 | 14 years old | 1316 |
28.3%
|
| 5 | 15 years old | 687 |
14.8%
|
| 6 | 16 years old | 221 |
4.7%
|
| 7 | 17 years old or older | 16 |
0.3%
|
| Sysmiss | 141 |