| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 70 | 
                                    
                                    63.1%
                                 | 
| -8 | Refusal (spontaneous) | 21 | 
                                    
                                    18.9%
                                 | 
| 0 | 5 | 
                                    
                                    4.5%
                                 | |
| 8 | 2 | 
                                    
                                    1.8%
                                 | |
| 10 | 3 | 
                                    
                                    2.7%
                                 | |
| 14 | 1 | 
                                    
                                    0.9%
                                 | |
| 15 | 9 | 
                                    
                                    8.1%
                                 |