| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very easy | 40 |
1.9%
|
| 2 | Easy | 294 |
14%
|
| 3 | Uncertain | 514 |
24.5%
|
| 4 | Difficult | 944 |
45%
|
| 5 | Very difficult | 298 |
14.2%
|
| 9 | 5 |
0.2%
|
|
| 13 | 1 |
0%
|
|
| 0 | NR | 30 | |
| Sysmiss | 874 |