| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
1.8%
|
| 1 | Very much difficult | 20 |
35.7%
|
| 2 | Moderately difficult | 27 |
48.2%
|
| 3 | Somewhat difficult | 7 |
12.5%
|
| 4 | Not difficult at all | 1 |
1.8%
|
| Sysmiss | 212 |