| Value | Category | 
                                    
                    
                        | 0 |  | 
                                    
                    
                        | 1 | no school available | 
                                    
                    
                        | 2 | had to work | 
                                    
                    
                        | 3 | didnot want | 
                                    
                    
                        | 4 | could not afford cost | 
                                    
                    
                        | 5 | ill | 
                                    
                    
                        | 6 | other | 
                            
            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.