| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 12 |
2%
|
| 0 | 525 |
87.5%
|
|
| 2 | 1 |
0.2%
|
|
| 5 | 4 |
0.7%
|
|
| 10 | 8 |
1.3%
|
|
| 15 | 2 |
0.3%
|
|
| 20 | 18 |
3%
|
|
| 25 | 2 |
0.3%
|
|
| 30 | 9 |
1.5%
|
|
| 33 | 2 |
0.3%
|
|
| 40 | 5 |
0.8%
|
|
| 50 | 5 |
0.8%
|
|
| 70 | 1 |
0.2%
|
|
| 80 | 1 |
0.2%
|
|
| 90 | 2 |
0.3%
|
|
| 95 | 1 |
0.2%
|
|
| 100 | 2 |
0.3%
|