| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very difficult | 49 |
5.1%
|
| 2 | Somewhat difficult | 220 |
22.8%
|
| 3 | Not difficult at all | 685 |
70.8%
|
| 4 | (DK) | 12 |
1.2%
|
| 5 | (ref) | 1 |
0.1%
|
| Sysmiss | 34 |