| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 10 |
4.7%
|
| 0 | 187 |
87%
|
|
| 5 | 3 |
1.4%
|
|
| 7 | 1 |
0.5%
|
|
| 10 | 4 |
1.9%
|
|
| 15 | 1 |
0.5%
|
|
| 20 | 2 |
0.9%
|
|
| 30 | 4 |
1.9%
|
|
| 50 | 2 |
0.9%
|
|
| 70 | 1 |
0.5%
|