| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not easy | 7 |
2.5%
|
| 2 | fairly easy | 57 |
20.3%
|
| 3 | easy | 172 |
61.2%
|
| 4 | very easy | 45 |
16%
|
| Sysmiss | 310 |