| Value | Category | Cases | |
|---|---|---|---|
| 1 | no, can't do it | 208 |
0.5%
|
| 2 | yes, can do with a lot of difficulty | 4589 |
10.3%
|
| 3 | yes, can do with some difficulty | 16440 |
36.9%
|
| 4 | yes, can do with no difficulty | 23307 |
52.3%
|
| 8 | don't know | 24 |
0.1%
|
| Sysmiss | 46 |