| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
0.5%
|
| 0 | 570 |
94.5%
|
|
| 5 | 2 |
0.3%
|
|
| 10 | 9 |
1.5%
|
|
| 15 | 1 |
0.2%
|
|
| 20 | 6 |
1%
|
|
| 25 | 1 |
0.2%
|
|
| 30 | 2 |
0.3%
|
|
| 40 | 2 |
0.3%
|
|
| 45 | 1 |
0.2%
|
|
| 48 | 1 |
0.2%
|
|
| 60 | 2 |
0.3%
|
|
| 75 | 1 |
0.2%
|
|
| 80 | 2 |
0.3%
|