| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 14 |
0.8%
|
| 2 | 12 years old | 5 |
0.3%
|
| 3 | 13 years old | 147 |
8.7%
|
| 4 | 14 years old | 494 |
29.2%
|
| 5 | 15 years old | 471 |
27.8%
|
| 6 | 16 years old | 260 |
15.4%
|
| 7 | 17 years old | 194 |
11.5%
|
| 8 | 18 years or older | 107 |
6.3%
|
| Sysmiss | 4 |