| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Very much difficult | 17 |
34%
|
| 2 | Moderately difficult | 14 |
28%
|
| 3 | Somewhat difficult | 18 |
36%
|
| 4 | Not difficult at all | 1 |
2%
|
| Sysmiss | 1250 |