| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very difficult. | 655 |
18.2%
|
| 2 | Fairly difficult. | 631 |
17.5%
|
| 3 | Fairly easy. | 575 |
15.9%
|
| 4 | Very easy. | 1747 |
48.4%
|
| Sysmiss | 83 |