| Value | Category | Cases | |
|---|---|---|---|
| 1 | no, can't do it | 215 |
0.5%
|
| 2 | yes, can do with a lot of difficulty | 249 |
0.6%
|
| 3 | yes, can do with some difficulty | 731 |
1.9%
|
| 4 | yes, can do with no difficulty | 37922 |
96.9%
|
| 8 | don't know | 21 |
0.1%
|
| Sysmiss | 5476 |