| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 292 |
12.1%
|
| 2 | 12 years old | 424 |
17.6%
|
| 3 | 13 years old | 447 |
18.6%
|
| 4 | 14 years old | 485 |
20.2%
|
| 5 | 15 years old | 361 |
15%
|
| 6 | 16 years old | 271 |
11.3%
|
| 7 | 17 years old or older | 124 |
5.2%
|
| Sysmiss | 78 |