| Value | Category | Cases | |
|---|---|---|---|
| 1 | no, can't do it | 13 |
0.4%
|
| 2 | yes, can do with a lot of difficulty | 17 |
0.6%
|
| 3 | yes, can do with some difficulty | 21 |
0.7%
|
| 4 | yes, can do with no difficulty | 2837 |
97.7%
|
| 8 | don't know | 16 |
0.6%
|
| Sysmiss | 41710 |