| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 15 |
1%
|
| 2 | 12 years old | 189 |
12.7%
|
| 3 | 13 years old | 344 |
23.1%
|
| 4 | 14 years old | 430 |
28.9%
|
| 5 | 15 years old | 347 |
23.3%
|
| 6 | 16 years old | 135 |
9.1%
|
| 7 | 17 years old or older | 28 |
1.9%
|
| Sysmiss | 7 |