| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 709 |
4.7%
|
| 2 | 12 years old | 1663 |
11%
|
| 3 | 13 years old | 4754 |
31.5%
|
| 4 | 14 years old | 4107 |
27.2%
|
| 5 | 15 years old | 2580 |
17.1%
|
| 6 | 16 years old | 988 |
6.5%
|
| 7 | 17 years old | 208 |
1.4%
|
| 8 | 18 and over | 95 |
0.6%
|
| Sysmiss | 853 |