| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 28 |
1.7%
|
| 2 | 12 years old | 26 |
1.6%
|
| 3 | 13 years old | 125 |
7.8%
|
| 4 | 14 years old | 461 |
28.8%
|
| 5 | 15 years old | 511 |
31.9%
|
| 6 | 16 years old | 332 |
20.7%
|
| 7 | 17 years old or older | 120 |
7.5%
|
| Sysmiss | 51 |