| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 14 |
0.5%
|
| 2 | 12 years old | 348 |
11.4%
|
| 3 | 13 years old | 458 |
15.1%
|
| 4 | 14 years old | 489 |
16.1%
|
| 5 | 15 years old | 536 |
17.6%
|
| 6 | 16 years old | 532 |
17.5%
|
| 7 | 17 years old or older | 665 |
21.9%
|
| Sysmiss | 19 |