| Value | Category | Cases | |
|---|---|---|---|
| 1 | no, can't do it | 47 |
0.1%
|
| 2 | yes, can do with a lot of difficulty | 822 |
1.8%
|
| 3 | yes, can do with some difficulty | 3149 |
7.1%
|
| 4 | yes, can do with no difficulty | 40546 |
91%
|
| 8 | don't know | 4 |
0%
|
| Sysmiss | 46 |