| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 21 |
14.1%
|
| 0 | 89 |
59.7%
|
|
| 10 | 1 |
0.7%
|
|
| 20 | 6 |
4%
|
|
| 25 | 1 |
0.7%
|
|
| 30 | 6 |
4%
|
|
| 40 | 3 |
2%
|
|
| 50 | 13 |
8.7%
|
|
| 60 | 3 |
2%
|
|
| 70 | 3 |
2%
|
|
| 80 | 1 |
0.7%
|
|
| 90 | 1 |
0.7%
|
|
| 100 | 1 |
0.7%
|