| Value | Category | Cases | |
|---|---|---|---|
| -9 | DON’T KNOW (SPONTANEOUS) | 1 |
0.3%
|
| -7 | DOES NOT APPLY (SPONTANEOUS) | 1 |
0.3%
|
| 0 | Very easy | 114 |
28.5%
|
| 1 | Easy | 242 |
60.5%
|
| 2 | Difficult | 40 |
10%
|
| 3 | Very dificult | 2 |
0.5%
|
| Sysmiss | 1173 |