| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 67 |
44.7%
|
| -8 | Refusal (spontaneous) | 28 |
18.7%
|
| 0 | 39 |
26%
|
|
| 2 | 2 |
1.3%
|
|
| 5 | 1 |
0.7%
|
|
| 10 | 4 |
2.7%
|
|
| 20 | 4 |
2.7%
|
|
| 30 | 1 |
0.7%
|
|
| 40 | 2 |
1.3%
|
|
| 60 | 1 |
0.7%
|
|
| 70 | 1 |
0.7%
|