| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 19 |
12.2%
|
|
| 10 | 1 |
0.6%
|
|
| 20 | 2 |
1.3%
|
|
| 30 | 3 |
1.9%
|
|
| 70 | 1 |
0.6%
|
|
| 80 | 1 |
0.6%
|
|
| 100 | 129 |
82.7%
|