| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 23 |
1.4%
|
| 2 | 12 years old | 128 |
7.9%
|
| 3 | 13 years old | 378 |
23.4%
|
| 4 | 14 years old | 448 |
27.8%
|
| 5 | 15 years old | 391 |
24.2%
|
| 6 | 16 years old | 177 |
11%
|
| 7 | 17 years old or older | 68 |
4.2%
|
| Sysmiss | 10 |