| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 463 |
22.7%
|
| 2 | 12 years old | 507 |
24.8%
|
| 3 | 13 years old | 407 |
19.9%
|
| 4 | 14 years old | 345 |
16.9%
|
| 5 | 15 years old | 182 |
8.9%
|
| 6 | 16 years old | 85 |
4.2%
|
| 7 | 17 years old or older | 52 |
2.5%
|
| Sysmiss | 70 |