| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 93 |
4.8%
|
| 2 | 12 years old | 225 |
11.7%
|
| 3 | 13 years old | 586 |
30.4%
|
| 4 | 14 years old | 601 |
31.2%
|
| 5 | 15 years old | 362 |
18.8%
|
| 6 | 16 years old | 41 |
2.1%
|
| 7 | 17 years old or older | 18 |
0.9%
|
| Sysmiss | 75 |