| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 20 |
13.4%
|
| 0 | 111 |
74.5%
|
|
| 5 | 1 |
0.7%
|
|
| 10 | 4 |
2.7%
|
|
| 20 | 4 |
2.7%
|
|
| 40 | 2 |
1.3%
|
|
| 50 | 3 |
2%
|
|
| 60 | 1 |
0.7%
|
|
| 80 | 1 |
0.7%
|
|
| 90 | 1 |
0.7%
|
|
| 100 | 1 |
0.7%
|