| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
1.1%
|
| 0 | 354 |
97%
|
|
| 10 | 3 |
0.8%
|
|
| 20 | 1 |
0.3%
|
|
| 30 | 1 |
0.3%
|
|
| 45 | 1 |
0.3%
|
|
| 60 | 1 |
0.3%
|