| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Very much difficult | 6 |
15.8%
|
| 2 | Moderately difficult | 10 |
26.3%
|
| 3 | Somewhat difficult | 8 |
21.1%
|
| 4 | Not difficult at all | 14 |
36.8%
|
| Sysmiss | 326 |