| Value | Category | Cases | |
|---|---|---|---|
| 1 | VERY EASY | 138 |
5.2%
|
| 2 | 180 |
6.8%
|
|
| 3 | 443 |
16.7%
|
|
| 4 | 584 |
22.1%
|
|
| 5 | VERY DIFFICULT | 1302 |
49.2%
|
| Sysmiss | 141 |