| Value | Category | Cases | |
|---|---|---|---|
| -8 | don't know | 63 |
18.4%
|
| 0 | 275 |
80.4%
|
|
| 500 | 1 |
0.3%
|
|
| 1000 | 1 |
0.3%
|
|
| 10000 | 1 |
0.3%
|
|
| 15000 | 1 |
0.3%
|
|
| Sysmiss | 6143 |