| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
9.6%
|
| 1 | Very much difficult | 6 |
11.5%
|
| 2 | Moderately difficult | 19 |
36.5%
|
| 3 | Somewhat difficult | 12 |
23.1%
|
| 4 | Not difficult at all | 10 |
19.2%
|
| Sysmiss | 98 |