| Value | Category | 
                                    
                    
                        | 80 | 80. Crèche or nursery | 
                                    
                    
                        | 81 | 81. School: reception grade | 
                                    
                    
                        | 82 | 82. No | 
                                    
                    
                        | 98 | 98. Refused | 
                                    
                    
                        | 99 | 99. Don't know | 
                            
            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.