| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 10 |
4.7%
|
| 0 | 195 |
90.7%
|
|
| 5 | 2 |
0.9%
|
|
| 15 | 1 |
0.5%
|
|
| 18 | 1 |
0.5%
|
|
| 20 | 1 |
0.5%
|
|
| 25 | 1 |
0.5%
|
|
| 50 | 1 |
0.5%
|
|
| 60 | 1 |
0.5%
|
|
| 70 | 1 |
0.5%
|
|
| 100 | 1 |
0.5%
|