| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very difficult | 92 |
10.8%
|
| 2 | Somewhat difficult | 293 |
34.5%
|
| 3 | Not difficult at all | 443 |
52.1%
|
| 4 | (DK) | 17 |
2%
|
| 5 | (ref) | 5 |
0.6%
|
| Sysmiss | 159 |