| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very difficult | 1565 |
14.6%
|
| 2 | Fairly difficult | 1239 |
11.6%
|
| 3 | Fairly easy | 1819 |
17%
|
| 4 | Very easy | 2299 |
21.5%
|
| 5 | I don't know | 3776 |
35.3%
|
| Sysmiss | 415 |