| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 75 |
6.3%
|
| 2 | 12 years old | 146 |
12.3%
|
| 3 | 13 years old | 233 |
19.6%
|
| 4 | 14 years old | 308 |
25.9%
|
| 5 | 15 years old | 242 |
20.3%
|
| 6 | 16 years old | 151 |
12.7%
|
| 7 | 17 years old or older | 36 |
3%
|
| Sysmiss | 117 |