| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
1.3%
|
| 1 | Very much difficult | 60 |
15.3%
|
| 2 | Moderately difficult | 115 |
29.4%
|
| 3 | Somewhat difficult | 148 |
37.9%
|
| 4 | Not difficult at all | 63 |
16.1%
|
| Sysmiss | 2306 |