| Value | Category | Cases | |
|---|---|---|---|
| 1 | no, can't do it | 0 |
0%
|
| 2 | yes, can do with a lot of difficulty | 0 |
0%
|
| 3 | yes, can do with some difficulty | 0 |
0%
|
| 4 | yes, can do with no difficulty | 10 |
90.9%
|
| 8 | don't know | 1 |
9.1%
|
| Sysmiss | 44603 |