| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very difficult | 157 |
16.2%
|
| 2 | Somewhat difficult | 417 |
42.9%
|
| 3 | Not difficult at all | 396 |
40.8%
|
| 4 | (DK) | 1 |
0.1%
|
| 5 | (ref) | 0 |
0%
|
| Sysmiss | 29 |