| Value | Category | Cases | |
|---|---|---|---|
| 1 | Impossible | 871 |
30.6%
|
| 2 | Very difficult | 264 |
9.3%
|
| 3 | Fairly difficult | 168 |
5.9%
|
| 4 | Fairly easy | 285 |
10%
|
| 5 | Very easy | 383 |
13.5%
|
| 6 | I do not know | 875 |
30.7%
|
| Sysmiss | 195 |