| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very difficult | 134 |
15%
|
| 2 | Somewhat difficult | 226 |
25.4%
|
| 3 | Not difficult at all | 518 |
58.1%
|
| 4 | (DK) | 12 |
1.3%
|
| 5 | (ref) | 1 |
0.1%
|
| Sysmiss | 126 |