| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 |
1.8%
|
| 0 | 161 |
41.5%
|
|
| 4 | 1 |
0.3%
|
|
| 5 | 3 |
0.8%
|
|
| 8 | 1 |
0.3%
|
|
| 10 | 18 |
4.6%
|
|
| 11 | 1 |
0.3%
|
|
| 12 | 1 |
0.3%
|
|
| 15 | 12 |
3.1%
|
|
| 20 | 30 |
7.7%
|
|
| 25 | 129 |
33.2%
|
|
| 30 | 14 |
3.6%
|
|
| 35 | 1 |
0.3%
|
|
| 40 | 5 |
1.3%
|
|
| 50 | 3 |
0.8%
|
|
| 60 | 1 |
0.3%
|