| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Very much difficult | 2 |
16.7%
|
| 2 | Moderately difficult | 3 |
25%
|
| 3 | Somewhat difficult | 2 |
16.7%
|
| 4 | Not difficult at all | 5 |
41.7%
|
| Sysmiss | 138 |