| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 24 |
7.8%
|
| 0 | 185 |
60.3%
|
|
| 2 | 1 |
0.3%
|
|
| 5 | 1 |
0.3%
|
|
| 10 | 17 |
5.5%
|
|
| 15 | 5 |
1.6%
|
|
| 18 | 1 |
0.3%
|
|
| 20 | 16 |
5.2%
|
|
| 25 | 1 |
0.3%
|
|
| 30 | 6 |
2%
|
|
| 40 | 7 |
2.3%
|
|
| 50 | 21 |
6.8%
|
|
| 60 | 6 |
2%
|
|
| 70 | 2 |
0.7%
|
|
| 80 | 3 |
1%
|
|
| 90 | 3 |
1%
|
|
| 95 | 1 |
0.3%
|
|
| 100 | 7 |
2.3%
|