| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 158 |
96.9%
|
|
| 20 | 2 |
1.2%
|
|
| 25 | 1 |
0.6%
|
|
| 40 | 1 |
0.6%
|
|
| 50 | 1 |
0.6%
|