| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
1.9%
|
| 1 | Very much difficult | 17 |
15.7%
|
| 2 | Moderately difficult | 40 |
37%
|
| 3 | Somewhat difficult | 35 |
32.4%
|
| 4 | Not difficult at all | 14 |
13%
|
| Sysmiss | 911 |