| Value | Category | 
                                    
                    
                        | 1 | Yes, all the time | 
                                    
                    
                        | 2 | Yes, often | 
                                    
                    
                        | 3 | Yes, sometimes | 
                                    
                    
                        | 4 | Yes, a few times | 
                                    
                    
                        | 5 | No | 
                                    
                    
                        | 8 | Not applicable | 
                                    
                    
                        | 9 | 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.