| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Very much difficult | 21 |
11.6%
|
| 2 | Moderately difficult | 63 |
34.8%
|
| 3 | Somewhat difficult | 71 |
39.2%
|
| 4 | Not difficult at all | 26 |
14.4%
|
| Sysmiss | 1337 |