| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
1%
|
| 1 | Very much difficult | 28 |
28%
|
| 2 | Moderately difficult | 47 |
47%
|
| 3 | Somewhat difficult | 20 |
20%
|
| 4 | Not difficult at all | 4 |
4%
|
| Sysmiss | 819 |