| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.6%
|
| 1 | Very much difficult | 22 |
14%
|
| 2 | Moderately difficult | 80 |
51%
|
| 3 | Somewhat difficult | 45 |
28.7%
|
| 4 | Not difficult at all | 9 |
5.7%
|
| Sysmiss | 850 |