| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | None | 0 |
0%
|
| 500 | 1 |
20%
|
|
| 1000 | 2 |
40%
|
|
| 1500 | 1 |
20%
|
|
| 500000 | 1 |
20%
|
|
| Sysmiss | 469 |