| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very difficult | 167 |
18.4%
|
| 2 | Somewhat difficult | 268 |
29.5%
|
| 3 | Not difficult at all | 465 |
51.2%
|
| 4 | (DK) | 7 |
0.8%
|
| 5 | (ref) | 1 |
0.1%
|
| Sysmiss | 92 |