| Value | Category | Cases | |
|---|---|---|---|
| -2 | don't know | 0 |
0%
|
| -1 | refuse | 3 |
12%
|
| 1 | 0-2000 | 11 |
44%
|
| 2 | 2001-12000 | 11 |
44%
|
| Sysmiss | 1024 |