| 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%
                                 
                                                             |