| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very difficult. | 1455 |
26.4%
|
| 2 | Fairly difficult. | 548 |
10%
|
| 3 | Fairly easy. | 646 |
11.7%
|
| 4 | Very easy | 2853 |
51.9%
|
| Sysmiss | 221 |