Value | Category | Cases | |
---|---|---|---|
1 | NO DIFFICULTY | 21827 |
97.2%
|
2 | SOME DIFFICULTY | 561 |
2.5%
|
3 | A LOT OF DIFFICULTY | 47 |
0.2%
|
4 | CANNOT SEE AT ALL | 7 |
0%
|
9 | NO RESPONSE | 12 |
0.1%
|
Sysmiss | 252 |