| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
0.5%
|
| 0 | 333 |
84.9%
|
|
| 5 | 1 |
0.3%
|
|
| 10 | 16 |
4.1%
|
|
| 15 | 2 |
0.5%
|
|
| 20 | 10 |
2.6%
|
|
| 30 | 6 |
1.5%
|
|
| 40 | 6 |
1.5%
|
|
| 50 | 11 |
2.8%
|
|
| 60 | 3 |
0.8%
|
|
| 70 | 2 |
0.5%
|