| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not easy | 6 |
2.8%
|
| 2 | fairly easy | 38 |
17.8%
|
| 3 | easy | 136 |
63.8%
|
| 4 | very easy | 33 |
15.5%
|
| Sysmiss | 378 |