| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not easy | 7 |
8.6%
|
| 2 | fairly easy | 15 |
18.5%
|
| 3 | easy | 54 |
66.7%
|
| 4 | very easy | 5 |
6.2%
|
| Sysmiss | 510 |