| Value | Category | Cases | |
|---|---|---|---|
| 1 | no, can't do it | 26 |
0.2%
|
| 2 | yes, can do with a lot of difficulty | 269 |
2.3%
|
| 3 | yes, can do with some difficulty | 868 |
7.5%
|
| 4 | yes, can do with no difficulty | 10330 |
89.7%
|
| 8 | don't know | 25 |
0.2%
|
| Sysmiss | 33096 |