| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
3.7%
|
| 1 | Very much difficult | 8 |
7.4%
|
| 2 | Moderately difficult | 26 |
24.1%
|
| 3 | Somewhat difficult | 45 |
41.7%
|
| 4 | Not difficult at all | 25 |
23.1%
|
| Sysmiss | 900 |