| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 61 |
10.2%
|
| 0 | 314 |
52.5%
|
|
| 5 | 8 |
1.3%
|
|
| 10 | 6 |
1%
|
|
| 15 | 1 |
0.2%
|
|
| 20 | 26 |
4.3%
|
|
| 22 | 1 |
0.2%
|
|
| 25 | 4 |
0.7%
|
|
| 30 | 31 |
5.2%
|
|
| 40 | 51 |
8.5%
|
|
| 50 | 39 |
6.5%
|
|
| 60 | 34 |
5.7%
|
|
| 70 | 6 |
1%
|
|
| 75 | 1 |
0.2%
|
|
| 80 | 4 |
0.7%
|
|
| 90 | 3 |
0.5%
|
|
| 100 | 8 |
1.3%
|