| Value | Category | Cases | |
|---|---|---|---|
| 1 | no, can't do it | 12 |
0.4%
|
| 2 | yes, can do with a lot of difficulty | 64 |
2.2%
|
| 3 | yes, can do with some difficulty | 182 |
6.3%
|
| 4 | yes, can do with no difficulty | 2637 |
90.8%
|
| 8 | don't know | 9 |
0.3%
|
| Sysmiss | 41710 |