| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 11 |
0.4%
|
| 2 | 12 years old | 282 |
10.6%
|
| 3 | 13 years old | 433 |
16.2%
|
| 4 | 14 years old | 463 |
17.4%
|
| 5 | 15 years old | 496 |
18.6%
|
| 6 | 16 years old | 529 |
19.8%
|
| 7 | 17 years old or older | 453 |
17%
|
| Sysmiss | 5 |