| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 380 |
96.9%
|
|
| 2 | 1 |
0.3%
|
|
| 10 | 10 |
2.6%
|
|
| 20 | 1 |
0.3%
|