| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.8%
|
| 0 | 72 |
60%
|
|
| 10 | 1 |
0.8%
|
|
| 20 | 1 |
0.8%
|
|
| 100 | 45 |
37.5%
|