| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 157 |
8.4%
|
| 2 | 12 years old | 156 |
8.3%
|
| 3 | 13 years old | 263 |
14.1%
|
| 4 | 14 years old | 388 |
20.8%
|
| 5 | 15 years old | 437 |
23.4%
|
| 6 | 16 years old | 257 |
13.8%
|
| 7 | 17 years old or older | 211 |
11.3%
|
| Sysmiss | 48 |