| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 129 |
6.3%
|
| 2 | 12 years old | 174 |
8.5%
|
| 3 | 13 years old | 280 |
13.7%
|
| 4 | 14 years old | 386 |
18.9%
|
| 5 | 15 years old | 353 |
17.3%
|
| 6 | 16 years old | 316 |
15.5%
|
| 7 | 17 years old or older | 402 |
19.7%
|
| Sysmiss | 69 |