| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very difficult | 872 |
24.4%
|
| 2 | Fairly difficult | 228 |
6.4%
|
| 3 | Fairly easy | 231 |
6.5%
|
| 4 | Very easy | 295 |
8.2%
|
| 5 | I don't know | 1950 |
54.5%
|
| Sysmiss | 164 |