| Value | Category | Cases | |
|---|---|---|---|
| 1 | Class 7 | 1720 |
23.2%
|
| 2 | Class 8 | 1693 |
22.8%
|
| 3 | Class 9 | 1617 |
21.8%
|
| 4 | Class 10 | 1454 |
19.6%
|
| 5 | Class 11 | 940 |
12.7%
|
| Sysmiss | 152 |