| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
1%
|
| 0 | 96 |
93.2%
|
|
| 10 | 2 |
1.9%
|
|
| 15 | 1 |
1%
|
|
| 25 | 1 |
1%
|
|
| 30 | 1 |
1%
|
|
| 60 | 1 |
1%
|