| Value | Category | Cases | |
|---|---|---|---|
| 1 | Porter Only | 1840 | 
                                                                 
                                    
                                    74.7%
                                 
                                                             | 
                                                        
                    
| 2 | Students Only | 11 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    
| 3 | Porter and Students | 600 | 
                                                                 
                                    
                                    24.4%
                                 
                                                             | 
                                                        
                    
| 4 | services company | 12 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             |