| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 32 |
5.4%
|
| 0 | 5 |
0.8%
|
|
| 20 | 5 |
0.8%
|
|
| 25 | 2 |
0.3%
|
|
| 30 | 1 |
0.2%
|
|
| 40 | 6 |
1%
|
|
| 50 | 15 |
2.5%
|
|
| 60 | 12 |
2%
|
|
| 65 | 1 |
0.2%
|
|
| 70 | 16 |
2.7%
|
|
| 75 | 1 |
0.2%
|
|
| 80 | 15 |
2.5%
|
|
| 90 | 11 |
1.8%
|
|
| 95 | 5 |
0.8%
|
|
| 100 | 471 |
78.8%
|