| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Very much difficult | 8 |
9.4%
|
| 2 | Moderately difficult | 34 |
40%
|
| 3 | Somewhat difficult | 20 |
23.5%
|
| 4 | Not difficult at all | 23 |
27.1%
|
| Sysmiss | 273 |