| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 50 |
18.5%
|
| 0 | 147 |
54.2%
|
|
| 1 | 2 |
0.7%
|
|
| 2 | 4 |
1.5%
|
|
| 5 | 9 |
3.3%
|
|
| 7 | 1 |
0.4%
|
|
| 8 | 1 |
0.4%
|
|
| 10 | 12 |
4.4%
|
|
| 12 | 1 |
0.4%
|
|
| 15 | 1 |
0.4%
|
|
| 20 | 19 |
7%
|
|
| 21 | 1 |
0.4%
|
|
| 30 | 7 |
2.6%
|
|
| 40 | 2 |
0.7%
|
|
| 42 | 1 |
0.4%
|
|
| 50 | 2 |
0.7%
|
|
| 60 | 2 |
0.7%
|
|
| 70 | 1 |
0.4%
|
|
| 90 | 1 |
0.4%
|
|
| 98 | 1 |
0.4%
|
|
| 100 | 6 |
2.2%
|