| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 415 |
3.8%
|
| 2 | 12 years old | 988 |
9.1%
|
| 3 | 13 years old | 1927 |
17.7%
|
| 4 | 14 years old | 2342 |
21.5%
|
| 5 | 15 years old | 2499 |
23%
|
| 6 | 16 years old | 1922 |
17.7%
|
| 7 | 17 years old or older | 775 |
7.1%
|
| Sysmiss | 201 |