| Value | Category | 
                                    
                    
                        | 1 | Less than half ( < 40 %) | 
                                    
                    
                        | 2 | About half (40%-59%) | 
                                    
                    
                        | 3 | Most/almost all (60%-99%) | 
                                    
                    
                        | 4 | All (100%) | 
                            
            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.