| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very difficult. | 384 |
18.3%
|
| 2 | Fairly difficult. | 164 |
7.8%
|
| 3 | Fairly easy. | 154 |
7.3%
|
| 4 | Very easy | 1395 |
66.5%
|
| Sysmiss | 36 |