| Value | Category | Cases | |
|---|---|---|---|
| 1 | no, can't do it | 8 |
0.5%
|
| 2 | yes, can do with a lot of difficulty | 25 |
1.7%
|
| 3 | yes, can do with some difficulty | 30 |
2%
|
| 4 | yes, can do with no difficulty | 1405 |
95.2%
|
| 8 | don't know | 8 |
0.5%
|
| Sysmiss | 43138 |