| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very difficult | 421 |
43.6%
|
| 2 | Somewhat difficult | 398 |
41.2%
|
| 3 | Not difficult at all | 145 |
15%
|
| 4 | (DK) | 0 |
0%
|
| 5 | (ref) | 1 |
0.1%
|
| Sysmiss | 35 |