| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very difficult | 23 |
2.3%
|
| 2 | Somewhat difficult | 75 |
7.6%
|
| 3 | Not difficult at all | 884 |
89.5%
|
| 4 | (DK) | 1 |
0.1%
|
| 5 | (ref) | 5 |
0.5%
|
| Sysmiss | 18 |