| Value | Category | Cases | |
|---|---|---|---|
| 1 | Bad sighted | 15 |
20.8%
|
| 2 | Blind | 4 |
5.6%
|
| 3 | No | 53 |
73.6%
|
| 7 | Missing | 0 |
0%
|
| 9 | Don't know | 0 |
0%
|
| Sysmiss | 6112 |