| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 22 |
2%
|
| 2 | 12 years old | 142 |
12.8%
|
| 3 | 13 years old | 161 |
14.5%
|
| 4 | 14 years old | 223 |
20.1%
|
| 5 | 15 years old | 192 |
17.3%
|
| 6 | 16 years old | 174 |
15.7%
|
| 7 | 17 years old | 143 |
12.9%
|
| 8 | 18 years old or older | 53 |
4.8%
|
| Sysmiss | 7 |