| Value | Category | 
                                    
                    
                        | 1 | enough for all children | 
                                    
                    
                        | 2 | some | 
                                    
                    
                        | 3 | none in use so far today | 
                                    
                    
                        | 4 | no writing tables | 
                            
            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.