| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 70 |
4.4%
|
| 2 | 12 years old | 204 |
12.7%
|
| 3 | 13 years old | 327 |
20.4%
|
| 4 | 14 years old | 385 |
24%
|
| 5 | 15 years old | 292 |
18.2%
|
| 6 | 16 years old | 189 |
11.8%
|
| 7 | 17 years old or older | 138 |
8.6%
|
| Sysmiss | 21 |