| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 15 |
2.5%
|
| 0 | 485 |
81.1%
|
|
| 5 | 1 |
0.2%
|
|
| 10 | 6 |
1%
|
|
| 15 | 1 |
0.2%
|
|
| 20 | 7 |
1.2%
|
|
| 25 | 1 |
0.2%
|
|
| 30 | 9 |
1.5%
|
|
| 38 | 1 |
0.2%
|
|
| 40 | 2 |
0.3%
|
|
| 45 | 1 |
0.2%
|
|
| 50 | 11 |
1.8%
|
|
| 60 | 11 |
1.8%
|
|
| 70 | 13 |
2.2%
|
|
| 80 | 4 |
0.7%
|
|
| 90 | 5 |
0.8%
|
|
| 95 | 2 |
0.3%
|
|
| 100 | 23 |
3.8%
|