| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very difficult | 135 |
13.4%
|
| 2 | Somewhat difficult | 419 |
41.6%
|
| 3 | Not difficult at all | 452 |
44.9%
|
| 4 | (DK) | 1 |
0.1%
|
| 5 | (ref) | 0 |
0%
|
| Sysmiss | 12 |