| Value | Category | Cases | |
|---|---|---|---|
| 1 | Below 6 | 0 |
0%
|
| 2 | 6 years old | 10 |
2.1%
|
| 3 | 7 years old | 109 |
23.1%
|
| 4 | 8 years old | 192 |
40.7%
|
| 5 | 9 years old | 94 |
19.9%
|
| 6 | 10 years old | 67 |
14.2%
|
| Sysmiss | 32 |