| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 1500 |
51.3%
|
| 2 | SOME DIFFICULTY | 196 |
6.7%
|
| 3 | A LOT OF DIFFICULTY | 5 |
0.2%
|
| 4 | CANNOT UNDERSTAND AT ALL | 1 |
0%
|
| Sysmiss | 1223 |
41.8%
|