| Value | Category | Cases | |
|---|---|---|---|
| -2 | don't know | 0 |
0%
|
| -1 | refuse | 2 |
8%
|
| 0 | 14 |
56%
|
|
| 1 | 1-1000 | 9 |
36%
|
| Sysmiss | 1024 |