| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 43 |
28.5%
|
| 0 | 58 |
38.4%
|
|
| 5 | 3 |
2%
|
|
| 10 | 13 |
8.6%
|
|
| 15 | 2 |
1.3%
|
|
| 20 | 6 |
4%
|
|
| 25 | 5 |
3.3%
|
|
| 30 | 5 |
3.3%
|
|
| 35 | 1 |
0.7%
|
|
| 40 | 2 |
1.3%
|
|
| 50 | 8 |
5.3%
|
|
| 80 | 2 |
1.3%
|
|
| 100 | 3 |
2%
|