| Value | Category | Cases | |
|---|---|---|---|
| -8 | don't know | 75 |
25.3%
|
| 0 | 214 |
72.3%
|
|
| 20 | 2 |
0.7%
|
|
| 500 | 1 |
0.3%
|
|
| 1500 | 1 |
0.3%
|
|
| 2000 | 1 |
0.3%
|
|
| 10000 | 2 |
0.7%
|
|
| Sysmiss | 6023 |