| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 |
0.5%
|
| 0 | 1236 |
95.1%
|
|
| 10 | 15 |
1.2%
|
|
| 15 | 4 |
0.3%
|
|
| 20 | 19 |
1.5%
|
|
| 25 | 1 |
0.1%
|
|
| 30 | 12 |
0.9%
|
|
| 40 | 1 |
0.1%
|
|
| 50 | 5 |
0.4%
|