| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 81 |
4.2%
|
| 2 | 12 years old | 163 |
8.4%
|
| 3 | 13 years old | 551 |
28.4%
|
| 4 | 14 years old | 507 |
26.1%
|
| 5 | 15 years old | 430 |
22.2%
|
| 6 | 16 years old | 155 |
8%
|
| 7 | 17 years old or older | 52 |
2.7%
|
| Sysmiss | 29 |