| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
4.4%
|
| 0 | 89 |
78.1%
|
|
| 10 | 1 |
0.9%
|
|
| 15 | 1 |
0.9%
|
|
| 20 | 7 |
6.1%
|
|
| 25 | 3 |
2.6%
|
|
| 30 | 2 |
1.8%
|
|
| 40 | 2 |
1.8%
|
|
| 50 | 3 |
2.6%
|
|
| 100 | 1 |
0.9%
|