| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 238 |
3.7%
|
| 2 | 12 years old | 157 |
2.4%
|
| 3 | 13 years old | 551 |
8.5%
|
| 4 | 14 years old | 1191 |
18.4%
|
| 5 | 15 years old | 1531 |
23.7%
|
| 6 | 16 years old | 1277 |
19.8%
|
| 7 | 17 years old or older | 1517 |
23.5%
|
| Sysmiss | 218 |