| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 240 |
7.8%
|
| 2 | 12 years old | 348 |
11.3%
|
| 3 | 13 years old | 551 |
17.8%
|
| 4 | 14 years old | 904 |
29.2%
|
| 5 | 15 years old | 680 |
22%
|
| 6 | 16 years old | 287 |
9.3%
|
| 7 | 17 years old or older | 82 |
2.7%
|
| Sysmiss | 21 |