| Value | Category | 
                                    
                    
                        | 1 | money shortage | 
                                    
                    
                        | 2 | it was not necessary at this stage | 
                                    
                    
                        | 3 | I was not sure in positive result | 
                                    
                    
                        | 4 | I had no time | 
                                    
                    
                        | 5 | I am going to | 
                                    
                    
                        | 6 | other | 
                                    
                    
                        | Sysmiss |  | 
                            
            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.