| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very difficult. | 524 |
16.3%
|
| 2 | Fairly difficult. | 479 |
14.9%
|
| 3 | Fairly easy. | 412 |
12.8%
|
| 4 | Very easy | 1802 |
56%
|
| Sysmiss | 65 |