| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Very much difficult | 32 |
33%
|
| 2 | Moderately difficult | 22 |
22.7%
|
| 3 | Somewhat difficult | 29 |
29.9%
|
| 4 | Not difficult at all | 14 |
14.4%
|
| Sysmiss | 518 |