| Value | 
                    Category | 
                                                                            
                                    
                    
                        | -9 | 
                        Don't know (spontaneous)  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | -8 | 
                        Refusal (spontaneous)  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | -7 | 
                        Does not apply  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 0 | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 20 | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 50 | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 100 | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 30000 | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 300000 | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 500000 | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 800000 | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 1000000 | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 2000000 | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | Sysmiss | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                            
            Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.