| Value | Category | Cases | |
|---|---|---|---|
| 1 | no, can't do it | 140 |
0.7%
|
| 2 | yes, can do with a lot of difficulty | 118 |
0.6%
|
| 3 | yes, can do with some difficulty | 199 |
1%
|
| 4 | yes, can do with no difficulty | 20001 |
97.1%
|
| 8 | don't know | 143 |
0.7%
|
| Sysmiss | 24013 |