| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very difficult. | 514 |
32.4%
|
| 2 | Fairly difficult. | 294 |
18.5%
|
| 3 | Fairly easy. | 454 |
28.6%
|
| 4 | Very easy | 326 |
20.5%
|
| Sysmiss | 9 |