| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very difficult. | 656 |
18.6%
|
| 2 | Fairly difficult. | 478 |
13.6%
|
| 3 | Fairly easy. | 656 |
18.6%
|
| 4 | Very easy. | 1737 |
49.2%
|
| Sysmiss | 60 |