| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not difficult | 2038 |
75%
|
| 2 | Possibly not difficult | 327 |
12%
|
| 3 | Possibly difficult | 249 |
9.2%
|
| 4 | Difficult | 104 |
3.8%
|
| Sysmiss | 9 |