| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 160 |
9.6%
|
| 0 | 1070 |
64.3%
|
|
| 5 | 30 |
1.8%
|
|
| 10 | 71 |
4.3%
|
|
| 15 | 35 |
2.1%
|
|
| 20 | 113 |
6.8%
|
|
| 25 | 30 |
1.8%
|
|
| 30 | 65 |
3.9%
|
|
| 35 | 7 |
0.4%
|
|
| 40 | 44 |
2.6%
|
|
| 45 | 2 |
0.1%
|
|
| 50 | 23 |
1.4%
|
|
| 60 | 3 |
0.2%
|
|
| 70 | 2 |
0.1%
|
|
| 80 | 1 |
0.1%
|
|
| 90 | 2 |
0.1%
|
|
| 100 | 5 |
0.3%
|