| Value | Category | Cases | |
|---|---|---|---|
| 1 | no, can't do it | 22 |
0.8%
|
| 2 | yes, can do with a lot of difficulty | 32 |
1.1%
|
| 3 | yes, can do with some difficulty | 69 |
2.4%
|
| 4 | yes, can do with no difficulty | 2768 |
95.3%
|
| 8 | don't know | 13 |
0.4%
|
| Sysmiss | 41710 |