| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
2.2%
|
| 1 | Very much difficult | 2 |
4.3%
|
| 2 | Moderately difficult | 8 |
17.4%
|
| 3 | Somewhat difficult | 15 |
32.6%
|
| 4 | Not difficult at all | 20 |
43.5%
|
| Sysmiss | 107 |