| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 51 |
5%
|
| 2 | 12 years old | 175 |
17%
|
| 3 | 13 years old | 180 |
17.5%
|
| 4 | 14 years old | 177 |
17.2%
|
| 5 | 15 years old | 195 |
18.9%
|
| 6 | 16 years old | 152 |
14.8%
|
| 7 | 17 years old | 78 |
7.6%
|
| 8 | 18 years old or older | 22 |
2.1%
|
| Sysmiss | 3 |