| Value | Category | Cases | |
|---|---|---|---|
| -8 | don't know | 47 |
28.8%
|
| 0 | 111 |
68.1%
|
|
| 400 | 1 |
0.6%
|
|
| 500 | 1 |
0.6%
|
|
| 1000 | 1 |
0.6%
|
|
| 2500 | 1 |
0.6%
|
|
| 7000 | 1 |
0.6%
|
|
| Sysmiss | 6156 |