| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 6 |
1.3%
|
| 0 | 457 |
96.4%
|
|
| 10 | 5 |
1.1%
|
|
| 20 | 1 |
0.2%
|
|
| 40 | 1 |
0.2%
|
|
| 100 | 4 |
0.8%
|