| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not easy | 10 |
3.3%
|
| 2 | fairly easy | 40 |
13.3%
|
| 3 | easy | 195 |
65%
|
| 4 | very easy | 55 |
18.3%
|
| Sysmiss | 291 |