| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not difficult at all | 102 |
38.6%
|
| 1 | Somewhat difficult | 96 |
36.4%
|
| 2 | Very difficult | 45 |
17%
|
| 3 | Extremely difficult | 21 |
8%
|
| Sysmiss | 56 |