| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 44 |
29.1%
|
| 0 | 78 |
51.7%
|
|
| 4 | 1 |
0.7%
|
|
| 5 | 5 |
3.3%
|
|
| 6 | 1 |
0.7%
|
|
| 10 | 7 |
4.6%
|
|
| 15 | 6 |
4%
|
|
| 18 | 1 |
0.7%
|
|
| 20 | 4 |
2.6%
|
|
| 25 | 3 |
2%
|
|
| 40 | 1 |
0.7%
|