| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 1 | Impassable | 56 | 
                                                                 
                                    
                                    2.3%
                                 
                                                             | 
                                                        
                    
| 2 | Very poor | 464 | 
                                                                 
                                    
                                    19.3%
                                 
                                                             | 
                                                        
                    
| 3 | Poor | 352 | 
                                                                 
                                    
                                    14.7%
                                 
                                                             | 
                                                        
                    
| 4 | Fair | 352 | 
                                                                 
                                    
                                    14.7%
                                 
                                                             | 
                                                        
                    
| 5 | Good | 736 | 
                                                                 
                                    
                                    30.7%
                                 
                                                             | 
                                                        
                    
| 6 | Very good | 440 | 
                                                                 
                                    
                                    18.3%
                                 
                                                             |