| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very difficult | 342 |
36.2%
|
| 2 | Somewhat difficult | 412 |
43.6%
|
| 3 | Not difficult at all | 177 |
18.8%
|
| 4 | (DK) | 3 |
0.3%
|
| 5 | (ref) | 10 |
1.1%
|
| Sysmiss | 56 |