| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
20%
|
| 500 | 1 |
20%
|
|
| 2500 | 1 |
20%
|
|
| 5000 | 1 |
20%
|
|
| 10000 | 1 |
20%
|
|
| Sysmiss | 115 |