| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 177 |
17.7%
|
| 0 | 258 |
25.7%
|
|
| 1 | 19 |
1.9%
|
|
| 2 | 19 |
1.9%
|
|
| 3 | 10 |
1%
|
|
| 4 | 2 |
0.2%
|
|
| 5 | 37 |
3.7%
|
|
| 6 | 1 |
0.1%
|
|
| 7 | 1 |
0.1%
|
|
| 10 | 88 |
8.8%
|
|
| 12 | 1 |
0.1%
|
|
| 15 | 8 |
0.8%
|
|
| 20 | 68 |
6.8%
|
|
| 23 | 2 |
0.2%
|
|
| 25 | 18 |
1.8%
|
|
| 30 | 56 |
5.6%
|
|
| 35 | 2 |
0.2%
|
|
| 40 | 36 |
3.6%
|
|
| 45 | 2 |
0.2%
|
|
| 50 | 59 |
5.9%
|
|
| 60 | 21 |
2.1%
|
|
| 65 | 1 |
0.1%
|
|
| 70 | 31 |
3.1%
|
|
| 75 | 5 |
0.5%
|
|
| 80 | 22 |
2.2%
|
|
| 85 | 1 |
0.1%
|
|
| 90 | 7 |
0.7%
|
|
| 95 | 1 |
0.1%
|
|
| 100 | 49 |
4.9%
|