| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not difficult at all | 133 |
46.7%
|
| 1 | Somewhat difficult | 97 |
34%
|
| 2 | Very difficult | 40 |
14%
|
| 3 | Extremely difficult | 15 |
5.3%
|
| Sysmiss | 35 |