| Value | Category | 
                                    
                    
                        | 1 | never | 
                                    
                    
                        | 2 | ONCE A YEAR | 
                                    
                    
                        | 3 | ONCE PER TERM | 
                                    
                    
                        | 4 | ONCE OR MORE A MONTH | 
                                    
                    
                        | 5 | I AM THE SCHOOL HEAD | 
                                    
                    
                        | 9 | omitted | 
                            
            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.