| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 144 |
2.9%
|
| 2 | 12 years old | 138 |
2.8%
|
| 3 | 13 years old | 797 |
16.1%
|
| 4 | 14 years old | 1572 |
31.8%
|
| 5 | 15 years old | 1486 |
30.1%
|
| 6 | 16 years old | 740 |
15%
|
| 7 | 17 years old or older | 59 |
1.2%
|
| Sysmiss | 94 |