| Value | Category | 
                                    
                    
                        | 1 | Walking | 
                                    
                    
                        | 2 | Bicycle | 
                                    
                    
                        | 3 | Motorcycle | 
                                    
                    
                        | 4 | Car | 
                                    
                    
                        | 5 | Public  Bus | 
                                    
                    
                        | 6 | Private Bus | 
                                    
                    
                        | 7 | Canoe/ Boat | 
                                    
                    
                        | 8 | Others | 
                                    
                    
                        | 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.