| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Very much difficult | 12 |
11%
|
| 2 | Moderately difficult | 44 |
40.4%
|
| 3 | Somewhat difficult | 27 |
24.8%
|
| 4 | Not difficult at all | 26 |
23.9%
|
| Sysmiss | 251 |