| Value | Category | Cases | |
|---|---|---|---|
| 1 | Sand | 35 | 
                                                                 
                                    
                                    2.2%
                                 
                                                             | 
                                                        
                    
| 2 | Smoothed mud | 1045 | 
                                                                 
                                    
                                    64.5%
                                 
                                                             | 
                                                        
                    
| 3 | Smooth cement | 534 | 
                                                                 
                                    
                                    33%
                                 
                                                             | 
                                                        
                    
| 4 | Wood | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 5 | Tile | 3 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    
| 6 | Other (Specify) | 2 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             |