| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 1 | Impassable | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 2 | Very poor | 208 | 
                                                                 
                                    
                                    17.3%
                                 
                                                             | 
                                                        
                    
| 3 | Poor | 144 | 
                                                                 
                                    
                                    12%
                                 
                                                             | 
                                                        
                    
| 4 | Fair | 416 | 
                                                                 
                                    
                                    34.7%
                                 
                                                             | 
                                                        
                    
| 5 | Good | 280 | 
                                                                 
                                    
                                    23.3%
                                 
                                                             | 
                                                        
                    
| 6 | Very good | 144 | 
                                                                 
                                    
                                    12%
                                 
                                                             | 
                                                        
                    
| 7 | None of above | 8 | 
                                                                 
                                    
                                    0.7%
                                 
                                                             |