| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 49 |
2.3%
|
| 2 | 12 years old | 151 |
7.2%
|
| 3 | 13 years old | 473 |
22.5%
|
| 4 | 14 years old | 501 |
23.8%
|
| 5 | 15 years old | 471 |
22.4%
|
| 6 | 16 years old | 365 |
17.3%
|
| 7 | 17 years old or older | 96 |
4.6%
|
| Sysmiss | 52 |