| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very difficult. | 1351 |
31.7%
|
| 2 | Fairly difficult. | 750 |
17.6%
|
| 3 | Fairly easy. | 682 |
16%
|
| 4 | Very easy | 1475 |
34.6%
|
| Sysmiss | 469 |