| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
3.6%
|
| 1 | Very much difficult | 24 |
17.5%
|
| 2 | Moderately difficult | 53 |
38.7%
|
| 3 | Somewhat difficult | 39 |
28.5%
|
| 4 | Not difficult at all | 16 |
11.7%
|
| Sysmiss | 224 |