| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 8 |
2.4%
|
| 2 | 12 years old | 45 |
13.7%
|
| 3 | 13 years old | 104 |
31.7%
|
| 4 | 14 years old | 102 |
31.1%
|
| 5 | 15 years old | 59 |
18%
|
| 6 | 16 years old | 8 |
2.4%
|
| 7 | 17 years old or older | 2 |
0.6%
|
| Sysmiss | 11 |