| Value | Category | Cases | |
|---|---|---|---|
| 1 | no, can't do it | 12 |
0.8%
|
| 2 | yes, can do with a lot of difficulty | 14 |
0.9%
|
| 3 | yes, can do with some difficulty | 20 |
1.4%
|
| 4 | yes, can do with no difficulty | 1402 |
95%
|
| 8 | don't know | 28 |
1.9%
|
| Sysmiss | 43138 |