| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 94 |
4.4%
|
| 2 | 12 years old | 195 |
9%
|
| 3 | 13 years old | 371 |
17.2%
|
| 4 | 14 years old | 462 |
21.4%
|
| 5 | 15 years old | 474 |
21.9%
|
| 6 | 16 years old | 320 |
14.8%
|
| 7 | 17 years old or older | 244 |
11.3%
|
| Sysmiss | 14 |