| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Very much difficult | 6 |
19.4%
|
| 2 | Moderately difficult | 15 |
48.4%
|
| 3 | Somewhat difficult | 8 |
25.8%
|
| 4 | Not difficult at all | 2 |
6.5%
|
| Sysmiss | 120 |