| Value | Category | 
                                    
                    
                        | 1 | < 6 mois | 
                                    
                    
                        | 2 | 6-11 mois | 
                                    
                    
                        | 3 | 12-23 mois | 
                                    
                    
                        | 4 | 24-35 mois | 
                                    
                    
                        | 5 | 36-47 mois | 
                                    
                    
                        | 6 | 48-59 mois | 
                                    
                    
                        | 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.