| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Very much difficult | 9 |
12.5%
|
| 2 | Moderately difficult | 17 |
23.6%
|
| 3 | Somewhat difficult | 13 |
18.1%
|
| 4 | Not difficult at all | 33 |
45.8%
|
| Sysmiss | 303 |