| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
1.2%
|
| 1 | Very much difficult | 11 |
6.5%
|
| 2 | Moderately difficult | 22 |
13%
|
| 3 | Somewhat difficult | 77 |
45.6%
|
| 4 | Not difficult at all | 57 |
33.7%
|
| Sysmiss | 443 |