| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 3665 |
58.5%
|
| 2 | SOME DIFFICULTY | 130 |
2.1%
|
| 3 | A LOT OF DIFFICULTY | 7 |
0.1%
|
| 4 | CANNOT UNDERSTAND AT ALL | 3 |
0%
|
| 9 | NO RESPONSE | 2 |
0%
|
| Sysmiss | 2462 |
39.3%
|