| Value | Category | Cases | |
|---|---|---|---|
| 1 | no, can't do it | 19 |
0.7%
|
| 2 | yes, can do with a lot of difficulty | 11 |
0.4%
|
| 3 | yes, can do with some difficulty | 14 |
0.5%
|
| 4 | yes, can do with no difficulty | 2819 |
97.1%
|
| 8 | don't know | 41 |
1.4%
|
| Sysmiss | 41710 |