| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Very much difficult | 7 |
7.9%
|
| 2 | Moderately difficult | 11 |
12.4%
|
| 3 | Somewhat difficult | 44 |
49.4%
|
| 4 | Not difficult at all | 27 |
30.3%
|
| Sysmiss | 1327 |