| Value | Category | Cases | |
|---|---|---|---|
| -8 | other error | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| -7 | filter error | 48 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    
| -5 | since birth | 8264 | 
                                                                 
                                    
                                    69.8%
                                 
                                                             | 
                                                        
                    
| -3 | inapplicable | 3519 | 
                                                                 
                                    
                                    29.7%
                                 
                                                             | 
                                                        
                    
| -2 | no answer | 7 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    
| -1 | does not know | 8 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             |