| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 23 |
1.5%
|
| 2 | 12 years old | 19 |
1.2%
|
| 3 | 13 years old | 235 |
15.2%
|
| 4 | 14 years old | 397 |
25.7%
|
| 5 | 15 years old | 483 |
31.3%
|
| 6 | 16 years old | 269 |
17.4%
|
| 7 | 17 years old or older | 118 |
7.6%
|
| Sysmiss | 26 |