| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not difficult at all | 104 |
32.7%
|
| 1 | Somewhat difficult | 90 |
28.3%
|
| 2 | Very difficult | 69 |
21.7%
|
| 3 | Extremely difficult | 55 |
17.3%
|
| Sysmiss | 2 |