| Value | Category | Cases | |
|---|---|---|---|
| -2 | don't know | 12 |
66.7%
|
| -1 | refuse | 2 |
11.1%
|
| 30 | 1 |
5.6%
|
|
| 80 | 1 |
5.6%
|
|
| 400 | 1 |
5.6%
|
|
| 600 | 1 |
5.6%
|
|
| Sysmiss | 1031 |