| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 27 |
7.6%
|
| 0 | 234 |
65.5%
|
|
| 5 | 3 |
0.8%
|
|
| 10 | 8 |
2.2%
|
|
| 15 | 4 |
1.1%
|
|
| 18 | 1 |
0.3%
|
|
| 20 | 13 |
3.6%
|
|
| 25 | 3 |
0.8%
|
|
| 30 | 17 |
4.8%
|
|
| 35 | 3 |
0.8%
|
|
| 40 | 7 |
2%
|
|
| 45 | 1 |
0.3%
|
|
| 50 | 13 |
3.6%
|
|
| 60 | 2 |
0.6%
|
|
| 70 | 5 |
1.4%
|
|
| 75 | 1 |
0.3%
|
|
| 80 | 5 |
1.4%
|
|
| 85 | 1 |
0.3%
|
|
| 99 | 1 |
0.3%
|
|
| 100 | 8 |
2.2%
|