| Value | Category | 
                                    
                    
                        | 1 | Other | 
                                    
                    
                        | 2 | Toilet | 
                                    
                    
                        | 3 | Kissing | 
                                    
                    
                        | 4 | Using drugs | 
                                    
                    
                        | 5 | Uncleanliness | 
                                    
                    
                        | 6 | Breathing same air | 
                                    
                    
                        | 7 | No washing after sex | 
                                    
                    
                        | 8 | Wearing PWA clothes | 
                                    
                    
                        | 9 | Anal sex | 
                            
            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.