| Value | Category | Cases | |
|---|---|---|---|
| 1 | no, can't do it | 284 |
0.2%
|
| 2 | yes, can do with a lot of difficulty | 1680 |
1.1%
|
| 3 | yes, can do with some difficulty | 5501 |
3.5%
|
| 4 | yes, can do with no difficulty | 150751 |
95.2%
|
| 8 | don't know | 67 |
0%
|
| Sysmiss | 4176 |