| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 11 |
9.9%
|
| 0 | 2 |
1.8%
|
|
| 20 | 2 |
1.8%
|
|
| 40 | 1 |
0.9%
|
|
| 50 | 2 |
1.8%
|
|
| 80 | 6 |
5.4%
|
|
| 90 | 2 |
1.8%
|
|
| 99 | 1 |
0.9%
|
|
| 100 | 84 |
75.7%
|