| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
4.5%
|
| 1 | Very much difficult | 4 |
6.1%
|
| 2 | Moderately difficult | 13 |
19.7%
|
| 3 | Somewhat difficult | 20 |
30.3%
|
| 4 | Not difficult at all | 26 |
39.4%
|
| Sysmiss | 579 |