| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 8 |
0.7%
|
| 2 | 12 years old | 18 |
1.7%
|
| 3 | 13 years old | 333 |
30.9%
|
| 4 | 14 years old | 325 |
30.2%
|
| 5 | 15 years old | 349 |
32.4%
|
| 6 | 16 years old | 29 |
2.7%
|
| 7 | 17 years old or older | 14 |
1.3%
|
| Sysmiss | 15 |