| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not easy | 16 |
7.3%
|
| 2 | fairly easy | 59 |
27.1%
|
| 3 | easy | 114 |
52.3%
|
| 4 | very easy | 29 |
13.3%
|
| Sysmiss | 373 |