| Value | Category | Cases | |
|---|---|---|---|
| 1 | Class 7 | 463 |
22.5%
|
| 2 | Class 8 | 613 |
29.8%
|
| 3 | Class 9 | 501 |
24.3%
|
| 4 | Class 10 | 416 |
20.2%
|
| 5 | Class 11 | 67 |
3.3%
|
| Sysmiss | 61 |