| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 93 |
6.8%
|
| 2 | 12 years old | 71 |
5.2%
|
| 3 | 13 years old | 131 |
9.5%
|
| 4 | 14 years old | 266 |
19.3%
|
| 5 | 15 years old | 323 |
23.5%
|
| 6 | 16 years old | 304 |
22.1%
|
| 7 | 17 years old or older | 189 |
13.7%
|
| Sysmiss | 25 |