| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 11 |
6.9%
|
| 1 | Very much difficult | 7 |
4.4%
|
| 2 | Moderately difficult | 45 |
28.1%
|
| 3 | Somewhat difficult | 41 |
25.6%
|
| 4 | Not difficult at all | 56 |
35%
|
| Sysmiss | 868 |