| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very difficult | 253 |
8.5%
|
| 2 | Fairly difficult | 173 |
5.8%
|
| 3 | Fairly easy | 411 |
13.8%
|
| 4 | Very easy | 192 |
6.4%
|
| 5 | I don't know | 1956 |
65.5%
|
| Sysmiss | 7 |