| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Very much difficult | 18 |
24.7%
|
| 2 | Moderately difficult | 38 |
52.1%
|
| 3 | Somewhat difficult | 9 |
12.3%
|
| 4 | Not difficult at all | 8 |
11%
|
| Sysmiss | 168 |