| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
10.7%
|
| 1 | Very much difficult | 1 |
3.6%
|
| 2 | Moderately difficult | 9 |
32.1%
|
| 3 | Somewhat difficult | 5 |
17.9%
|
| 4 | Not difficult at all | 10 |
35.7%
|
| Sysmiss | 117 |