Value | Category | Cases | |
---|---|---|---|
1 | No difficulty | 23060 |
96.7%
|
2 | Some difficulty | 658 |
2.8%
|
3 | A lot of difficulty | 96 |
0.4%
|
4 | Cannot see at all | 18 |
0.1%
|
9 | No response | 11 |
0%
|
Sysmiss | 18565 |