| Value | Category | 
                                    
                    
                        | 1 | it was organized by the employer | 
                                    
                    
                        | 2 | it was organized by the labour office | 
                                    
                    
                        | 3 | it was my own initiative | 
                                    
                    
                        | 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.