| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 17 |
1%
|
| 0 | 1700 |
98.6%
|
|
| 1 | 1 |
0.1%
|
|
| 30 | 2 |
0.1%
|
|
| 67 | 1 |
0.1%
|
|
| 80 | 1 |
0.1%
|
|
| 100 | 3 |
0.2%
|