| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very difficult | 387 |
8.5%
|
| 2 | Fairly difficult | 160 |
3.5%
|
| 3 | Fairly easy | 378 |
8.3%
|
| 4 | Very easy | 357 |
7.8%
|
| 5 | I don't know | 3294 |
72%
|
| Sysmiss | 122 |