| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 32 |
5.3%
|
| 0 | 472 |
78.7%
|
|
| 5 | 9 |
1.5%
|
|
| 10 | 13 |
2.2%
|
|
| 15 | 4 |
0.7%
|
|
| 18 | 1 |
0.2%
|
|
| 20 | 14 |
2.3%
|
|
| 25 | 2 |
0.3%
|
|
| 30 | 15 |
2.5%
|
|
| 40 | 14 |
2.3%
|
|
| 50 | 4 |
0.7%
|
|
| 52 | 1 |
0.2%
|
|
| 60 | 4 |
0.7%
|
|
| 70 | 3 |
0.5%
|
|
| 80 | 2 |
0.3%
|
|
| 100 | 10 |
1.7%
|