| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 77 |
69.4%
|
| -8 | Refusal (spontaneous) | 14 |
12.6%
|
| 0 | 5 |
4.5%
|
|
| 1 | 1 |
0.9%
|
|
| 15 | 5 |
4.5%
|
|
| 20 | 1 |
0.9%
|
|
| 35 | 1 |
0.9%
|
|
| 40 | 5 |
4.5%
|
|
| 50 | 2 |
1.8%
|