| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very difficult | 165 |
18.1%
|
| 2 | Somewhat difficult | 390 |
42.7%
|
| 3 | Not difficult at all | 333 |
36.5%
|
| 4 | (DK) | 24 |
2.6%
|
| 5 | (ref) | 1 |
0.1%
|
| Sysmiss | 87 |