| Value | Category | 
                                    
                    
                        | 1 | Education | 
                                    
                    
                        | 2 | Working | 
                                    
                    
                        | 3 | In military service | 
                                    
                    
                        | 4 | Business trip | 
                                    
                    
                        | 5 | Hospitalisation | 
                                    
                    
                        | 6 | Tourist travel | 
                                    
                    
                        | 7 | Emigration | 
                                    
                    
                        | 8 | Other | 
                                    
                    
                        | 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.