| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very difficult. | 858 |
18.7%
|
| 2 | Fairly difficult. | 445 |
9.7%
|
| 3 | Fairly easy. | 804 |
17.5%
|
| 4 | Very easy | 2489 |
54.2%
|
| Sysmiss | 107 |