| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 6 |
5%
|
| 0 | 1 |
0.8%
|
|
| 1 | 7 |
5.8%
|
|
| 2 | 27 |
22.5%
|
|
| 3 | 17 |
14.2%
|
|
| 4 | 21 |
17.5%
|
|
| 5 | 14 |
11.7%
|
|
| 6 | 8 |
6.7%
|
|
| 7 | 2 |
1.7%
|
|
| 8 | 1 |
0.8%
|
|
| 9 | 3 |
2.5%
|
|
| 10 | 6 |
5%
|
|
| 11 | 1 |
0.8%
|
|
| 12 | 2 |
1.7%
|
|
| 15 | 1 |
0.8%
|
|
| 23 | 1 |
0.8%
|
|
| 30 | 1 |
0.8%
|
|
| 40 | 1 |
0.8%
|