| Value | Category | 
                                    
                    
                        | 1 | 1. Yes | 
                                    
                    
                        | 2 | 2. No | 
                                    
                    
                        | 3 | 3. don't know | 
                                    
                    
                        | 4 | 4. No response/refused | 
                                    
                    
                        | 98 | 98. No response/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.