| Value | Category | Cases | |
|---|---|---|---|
| 1 | no, can't do it | 0 |
0%
|
| 2 | yes, can do with a lot of difficulty | 4 |
1%
|
| 3 | yes, can do with some difficulty | 4 |
1%
|
| 4 | yes, can do with no difficulty | 406 |
98.1%
|
| 8 | don't know | 0 |
0%
|
| Sysmiss | 44200 |