| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very difficult | 173 |
5.1%
|
| 2 | Somewhat difficult | 679 |
20.1%
|
| 3 | Not difficult at all | 2511 |
74.4%
|
| 4 | (DK) | 11 |
0.3%
|
| 5 | (ref) | 1 |
0%
|
| Sysmiss | 125 |