| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 1 | Impassable | 32 | 
                                                                 
                                    
                                    2.7%
                                 
                                                             | 
                                                        
                    
| 2 | Very poor | 424 | 
                                                                 
                                    
                                    35.3%
                                 
                                                             | 
                                                        
                    
| 3 | Poor | 216 | 
                                                                 
                                    
                                    18%
                                 
                                                             | 
                                                        
                    
| 4 | Fair | 152 | 
                                                                 
                                    
                                    12.7%
                                 
                                                             | 
                                                        
                    
| 5 | Good | 296 | 
                                                                 
                                    
                                    24.7%
                                 
                                                             | 
                                                        
                    
| 6 | Very good | 80 | 
                                                                 
                                    
                                    6.7%
                                 
                                                             |