| Value | Category | Cases | |
|---|---|---|---|
| 1 | very hard | 1265 |
63.8%
|
| 2 | hard | 480 |
24.2%
|
| 3 | easy | 177 |
8.9%
|
| 4 | very easy | 60 |
3%
|
| Sysmiss | 22 |