| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very difficult | 335 |
42.2%
|
| 2 | Somewhat difficult | 224 |
28.2%
|
| 3 | Not difficult at all | 223 |
28.1%
|
| 4 | (DK) | 10 |
1.3%
|
| 5 | (ref) | 1 |
0.1%
|
| Sysmiss | 221 |