| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 125 |
7.2%
|
| 2 | 12 years old | 264 |
15.2%
|
| 3 | 13 years old | 338 |
19.5%
|
| 4 | 14 years old | 437 |
25.2%
|
| 5 | 15 years old | 266 |
15.3%
|
| 6 | 16 years old | 197 |
11.3%
|
| 7 | 17 years old or older | 109 |
6.3%
|
| Sysmiss | 11 |