| Value | Category | Cases | |
|---|---|---|---|
| 1 | no, can't do it | 83 |
0.4%
|
| 2 | yes, can do with a lot of difficulty | 106 |
0.5%
|
| 3 | yes, can do with some difficulty | 206 |
1%
|
| 4 | yes, can do with no difficulty | 20113 |
97.6%
|
| 8 | don't know | 93 |
0.5%
|
| Sysmiss | 24013 |