| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Very much difficult | 25 |
19.7%
|
| 2 | Moderately difficult | 48 |
37.8%
|
| 3 | Somewhat difficult | 34 |
26.8%
|
| 4 | Not difficult at all | 20 |
15.7%
|
| Sysmiss | 852 |