| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 1 | Earth | 840 | 
                                                                 
                                    
                                    35%
                                 
                                                             | 
                                                        
                    
| 2 | Gravel | 40 | 
                                                                 
                                    
                                    1.7%
                                 
                                                             | 
                                                        
                    
| 3 | Stone | 64 | 
                                                                 
                                    
                                    2.7%
                                 
                                                             | 
                                                        
                    
| 4 | Muram | 840 | 
                                                                 
                                    
                                    35%
                                 
                                                             | 
                                                        
                    
| 5 | Paved/ Tarred | 600 | 
                                                                 
                                    
                                    25%
                                 
                                                             | 
                                                        
                    
| 6 | Concrete | 16 | 
                                                                 
                                    
                                    0.7%
                                 
                                                             | 
                                                        
                    
| 7 | None of above | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             |