| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Very much difficult | 36 |
24.2%
|
| 2 | Moderately difficult | 63 |
42.3%
|
| 3 | Somewhat difficult | 34 |
22.8%
|
| 4 | Not difficult at all | 16 |
10.7%
|
| Sysmiss | 580 |