| Value | Category | Cases | |
|---|---|---|---|
| 1 | no, can't do it | 29 |
0.3%
|
| 2 | yes, can do with a lot of difficulty | 93 |
0.8%
|
| 3 | yes, can do with some difficulty | 310 |
2.7%
|
| 4 | yes, can do with no difficulty | 11061 |
96%
|
| 8 | don't know | 25 |
0.2%
|
| Sysmiss | 33096 |