| Value | Category | Cases | |
|---|---|---|---|
| 1 | no, can't do it | 21 |
0%
|
| 2 | yes, can do with a lot of difficulty | 90 |
0.2%
|
| 3 | yes, can do with some difficulty | 354 |
0.8%
|
| 4 | yes, can do with no difficulty | 44100 |
98.9%
|
| 8 | don't know | 3 |
0%
|
| Sysmiss | 46 |