| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 128 |
16.8%
|
| 0 | 269 |
35.4%
|
|
| 2 | 3 |
0.4%
|
|
| 5 | 5 |
0.7%
|
|
| 10 | 41 |
5.4%
|
|
| 15 | 2 |
0.3%
|
|
| 20 | 55 |
7.2%
|
|
| 25 | 4 |
0.5%
|
|
| 30 | 56 |
7.4%
|
|
| 35 | 3 |
0.4%
|
|
| 40 | 34 |
4.5%
|
|
| 45 | 4 |
0.5%
|
|
| 50 | 81 |
10.7%
|
|
| 55 | 1 |
0.1%
|
|
| 60 | 23 |
3%
|
|
| 70 | 15 |
2%
|
|
| 75 | 1 |
0.1%
|
|
| 80 | 21 |
2.8%
|
|
| 85 | 1 |
0.1%
|
|
| 90 | 11 |
1.4%
|
|
| 100 | 2 |
0.3%
|