| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
0.3%
|
| 0 | 267 |
44.4%
|
|
| 5 | 1 |
0.2%
|
|
| 10 | 6 |
1%
|
|
| 15 | 7 |
1.2%
|
|
| 20 | 17 |
2.8%
|
|
| 25 | 2 |
0.3%
|
|
| 30 | 5 |
0.8%
|
|
| 35 | 1 |
0.2%
|
|
| 40 | 1 |
0.2%
|
|
| 45 | 1 |
0.2%
|
|
| 50 | 3 |
0.5%
|
|
| 80 | 1 |
0.2%
|
|
| 100 | 287 |
47.8%
|