| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 131 |
9.9%
|
| 0 | 434 |
32.8%
|
|
| 1 | 5 |
0.4%
|
|
| 2 | 3 |
0.2%
|
|
| 4 | 1 |
0.1%
|
|
| 5 | 49 |
3.7%
|
|
| 7 | 2 |
0.2%
|
|
| 10 | 118 |
8.9%
|
|
| 11 | 1 |
0.1%
|
|
| 12 | 2 |
0.2%
|
|
| 13 | 1 |
0.1%
|
|
| 15 | 66 |
5%
|
|
| 18 | 2 |
0.2%
|
|
| 20 | 136 |
10.3%
|
|
| 22 | 2 |
0.2%
|
|
| 25 | 41 |
3.1%
|
|
| 30 | 124 |
9.4%
|
|
| 33 | 3 |
0.2%
|
|
| 35 | 15 |
1.1%
|
|
| 40 | 46 |
3.5%
|
|
| 45 | 5 |
0.4%
|
|
| 50 | 56 |
4.2%
|
|
| 51 | 1 |
0.1%
|
|
| 55 | 1 |
0.1%
|
|
| 60 | 24 |
1.8%
|
|
| 65 | 2 |
0.2%
|
|
| 70 | 20 |
1.5%
|
|
| 75 | 2 |
0.2%
|
|
| 80 | 14 |
1.1%
|
|
| 85 | 2 |
0.2%
|
|
| 90 | 4 |
0.3%
|
|
| 99 | 1 |
0.1%
|
|
| 100 | 9 |
0.7%
|