| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 40 |
2.7%
|
| 2 | 12 years old | 79 |
5.3%
|
| 3 | 13 years old | 193 |
12.9%
|
| 4 | 14 years old | 263 |
17.5%
|
| 5 | 15 years old | 359 |
23.9%
|
| 6 | 16 years old | 350 |
23.3%
|
| 7 | 17 years old or older | 217 |
14.5%
|
| Sysmiss | 30 |