| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 51 |
8.2%
|
| 2 | 12 years old | 143 |
22.9%
|
| 3 | 13 years old | 73 |
11.7%
|
| 4 | 14 years old | 138 |
22.1%
|
| 5 | 15 years old | 107 |
17.1%
|
| 6 | 16 years old | 66 |
10.6%
|
| 7 | 17 years old or older | 46 |
7.4%
|
| Sysmiss | 13 |