| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
0.4%
|
| 0 | 1003 |
97.9%
|
|
| 1 | 11 |
1.1%
|
|
| 2 | 2 |
0.2%
|
|
| 3 | 1 |
0.1%
|
|
| 5 | 1 |
0.1%
|
|
| 50 | 2 |
0.2%
|