| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 36 | 
                                    
                                    40.4%
                                 | 
| -8 | Refusal (spontaneous) | 13 | 
                                    
                                    14.6%
                                 | 
| 0 | 8 | 
                                    
                                    9%
                                 | |
| 2 | 1 | 
                                    
                                    1.1%
                                 | |
| 5 | 1 | 
                                    
                                    1.1%
                                 | |
| 10 | 1 | 
                                    
                                    1.1%
                                 | |
| 12 | 1 | 
                                    
                                    1.1%
                                 | |
| 20 | 2 | 
                                    
                                    2.2%
                                 | |
| 30 | 5 | 
                                    
                                    5.6%
                                 | |
| 40 | 1 | 
                                    
                                    1.1%
                                 | |
| 45 | 1 | 
                                    
                                    1.1%
                                 | |
| 50 | 11 | 
                                    
                                    12.4%
                                 | |
| 60 | 1 | 
                                    
                                    1.1%
                                 | |
| 65 | 1 | 
                                    
                                    1.1%
                                 | |
| 90 | 1 | 
                                    
                                    1.1%
                                 | |
| 100 | 5 | 
                                    
                                    5.6%
                                 | |
| Sysmiss | 8 |