| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 |
4.7%
|
| 0 | 124 |
83.2%
|
|
| 10 | 1 |
0.7%
|
|
| 20 | 2 |
1.3%
|
|
| 35 | 1 |
0.7%
|
|
| 50 | 3 |
2%
|
|
| 55 | 1 |
0.7%
|
|
| 60 | 1 |
0.7%
|
|
| 100 | 9 |
6%
|