| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 55 |
6.4%
|
| 2 | 12 years old | 109 |
12.6%
|
| 3 | 13 years old | 211 |
24.5%
|
| 4 | 14 years old | 264 |
30.6%
|
| 5 | 15 years old | 171 |
19.8%
|
| 6 | 16 years old | 38 |
4.4%
|
| 7 | 17 years old or older | 14 |
1.6%
|
| Sysmiss | 40 |