| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 8 |
10.3%
|
| 1 | Very much difficult | 3 |
3.8%
|
| 2 | Moderately difficult | 18 |
23.1%
|
| 3 | Somewhat difficult | 17 |
21.8%
|
| 4 | Not difficult at all | 32 |
41%
|
| Sysmiss | 233 |