| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Very much difficult | 28 |
36.4%
|
| 2 | Moderately difficult | 28 |
36.4%
|
| 3 | Somewhat difficult | 19 |
24.7%
|
| 4 | Not difficult at all | 2 |
2.6%
|
| Sysmiss | 572 |