| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 13 |
0.9%
|
| 2 | 12 years old | 148 |
10.8%
|
| 3 | 13 years old | 515 |
37.6%
|
| 4 | 14 years old | 448 |
32.7%
|
| 5 | 15 years old | 205 |
15%
|
| 6 | 16 years old | 35 |
2.6%
|
| 7 | 17 years old or older | 5 |
0.4%
|
| Sysmiss | 4 |