| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
5.4%
|
| 1 | Very much difficult | 12 |
13%
|
| 2 | Moderately difficult | 30 |
32.6%
|
| 3 | Somewhat difficult | 24 |
26.1%
|
| 4 | Not difficult at all | 21 |
22.8%
|
| Sysmiss | 910 |