| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
2.4%
|
| 1 | Very much difficult | 5 |
12.2%
|
| 2 | Moderately difficult | 18 |
43.9%
|
| 3 | Somewhat difficult | 11 |
26.8%
|
| 4 | Not difficult at all | 6 |
14.6%
|
| Sysmiss | 205 |