| Value | Category | Cases | |
|---|---|---|---|
| 1 | no, can't do it | 243 |
0.8%
|
| 2 | yes, can do with a lot of difficulty | 213 |
0.7%
|
| 3 | yes, can do with some difficulty | 305 |
1%
|
| 4 | yes, can do with no difficulty | 29777 |
97.2%
|
| 8 | don't know | 111 |
0.4%
|
| Sysmiss | 13965 |