| Value | Category | 
                                    
                    
                        | 1 | Not attending school | 
                                    
                    
                        | 2 | Yes, milk | 
                                    
                    
                        | 3 | Yes, formula | 
                                    
                    
                        | 4 | Do not know | 
                                    
                    
                        | 5 | Other | 
                                    
                    
                        | 8 | Not applicable | 
                                    
                    
                        | 9 | Unspecified | 
                            
            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.