| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
7.7%
|
| 1 | Very much difficult | 5 |
19.2%
|
| 2 | Moderately difficult | 7 |
26.9%
|
| 3 | Somewhat difficult | 5 |
19.2%
|
| 4 | Not difficult at all | 7 |
26.9%
|
| Sysmiss | 972 |