| Value | Category | 
                                    
                    
                        | 0 | NIU (not in universe) | 
                                    
                    
                        | 10 | Work | 
                                    
                    
                        | 11 | Seeking work | 
                                    
                    
                        | 12 | Job relocation | 
                                    
                    
                        | 13 | Job assignment | 
                                    
                    
                        | 14 | Opportunity | 
                                    
                    
                        | 15 | Proximity to work | 
                                    
                    
                        | 19 | Other work | 
                                    
                    
                        | 20 | Family move | 
                                    
                    
                        | 21 | Follow household head | 
                                    
                    
                        | 22 | Follow spouse | 
                                    
                    
                        | 23 | Follow relative | 
                                    
                    
                        | 30 | Study | 
                                    
                    
                        | 31 | End of education | 
                                    
                    
                        | 40 | Marriage, divorce, widowhood | 
                                    
                    
                        | 41 | Marriage or union | 
                                    
                    
                        | 42 | Divorce or widowhood | 
                                    
                    
                        | 50 | Insecurity, disaster, or violence | 
                                    
                    
                        | 51 | War | 
                                    
                    
                        | 52 | Violence or insecurity | 
                                    
                    
                        | 53 | Social or political problems, including security | 
                                    
                    
                        | 54 | Natural disaster | 
                                    
                    
                        | 57 | Natural disaster or insecurity | 
                                    
                    
                        | 58 | Environmental/climatic | 
                                    
                    
                        | 60 | Other reason | 
                                    
                    
                        | 61 | Health | 
                                    
                    
                        | 62 | Repatriation | 
                                    
                    
                        | 63 | Retirement | 
                                    
                    
                        | 64 | House or flat acquisition | 
                                    
                    
                        | 65 | Housing problems | 
                                    
                    
                        | 66 | Visiting | 
                                    
                    
                        | 67 | Ordination | 
                                    
                    
                        | 68 | Military or institutional housing | 
                                    
                    
                        | 69 | Other reason, not elsewhere classified | 
                                    
                    
                        | 99 | Not specified | 
                            
            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.