| Value | Category | Cases | |
|---|---|---|---|
| 1 | no, can't do it | 87 |
0.8%
|
| 2 | yes, can do with a lot of difficulty | 55 |
0.5%
|
| 3 | yes, can do with some difficulty | 122 |
1.1%
|
| 4 | yes, can do with no difficulty | 11138 |
96.7%
|
| 8 | don't know | 116 |
1%
|
| Sysmiss | 33096 |