| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 50 |
18.5%
|
| 0 | 176 |
64.9%
|
|
| 2 | 1 |
0.4%
|
|
| 3 | 1 |
0.4%
|
|
| 5 | 4 |
1.5%
|
|
| 10 | 17 |
6.3%
|
|
| 20 | 15 |
5.5%
|
|
| 30 | 4 |
1.5%
|
|
| 50 | 1 |
0.4%
|
|
| 80 | 1 |
0.4%
|
|
| 100 | 1 |
0.4%
|