| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 |
3.3%
|
| -4 | Too many to count | 171 |
81.8%
|
| 0 | 1 |
0.5%
|
|
| 1 | 1 |
0.5%
|
|
| 2 | 6 |
2.9%
|
|
| 3 | 7 |
3.3%
|
|
| 4 | 4 |
1.9%
|
|
| 5 | 3 |
1.4%
|
|
| 8 | 1 |
0.5%
|
|
| 10 | 1 |
0.5%
|
|
| 13 | 1 |
0.5%
|
|
| 15 | 3 |
1.4%
|
|
| 20 | 2 |
1%
|
|
| 30 | 1 |
0.5%
|