| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Very much difficult | 22 |
28.2%
|
| 2 | Moderately difficult | 18 |
23.1%
|
| 3 | Somewhat difficult | 20 |
25.6%
|
| 4 | Not difficult at all | 18 |
23.1%
|
| Sysmiss | 275 |