| Value | Category | Cases | |
|---|---|---|---|
| 1 | no, can't do it | 96 |
0.2%
|
| 2 | yes, can do with a lot of difficulty | 467 |
1.2%
|
| 3 | yes, can do with some difficulty | 2080 |
5.3%
|
| 4 | yes, can do with no difficulty | 36463 |
93.2%
|
| 8 | don't know | 32 |
0.1%
|
| Sysmiss | 5476 |