| Value | Category | Cases | |
|---|---|---|---|
| 1 | Impossible | 525 |
27%
|
| 2 | Very difficult | 388 |
20%
|
| 3 | Fairly difficult | 73 |
3.8%
|
| 4 | Fairly easy | 40 |
2.1%
|
| 5 | Very easy | 95 |
4.9%
|
| 6 | I do not know | 820 |
42.2%
|
| Sysmiss | 54 |