| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very difficult | 100 |
11.4%
|
| 2 | Somewhat difficult | 300 |
34.2%
|
| 3 | Not difficult at all | 450 |
51.3%
|
| 4 | (DK) | 19 |
2.2%
|
| 5 | (ref) | 8 |
0.9%
|
| Sysmiss | 123 |