| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 19 |
12.8%
|
| 0 | 5 |
3.4%
|
|
| 10 | 1 |
0.7%
|
|
| 20 | 3 |
2%
|
|
| 25 | 1 |
0.7%
|
|
| 30 | 4 |
2.7%
|
|
| 40 | 3 |
2%
|
|
| 50 | 20 |
13.4%
|
|
| 60 | 11 |
7.4%
|
|
| 70 | 7 |
4.7%
|
|
| 75 | 2 |
1.3%
|
|
| 80 | 5 |
3.4%
|
|
| 85 | 1 |
0.7%
|
|
| 90 | 2 |
1.3%
|
|
| 100 | 65 |
43.6%
|