| Value | Category | Cases | |
|---|---|---|---|
| 1 | Sand | 26 | 
                                    
                                    2%
                                 | 
| 2 | Smoothed mud | 580 | 
                                    
                                    44.1%
                                 | 
| 3 | Smooth cement | 681 | 
                                    
                                    51.7%
                                 | 
| 4 | Tile | 26 | 
                                    
                                    2%
                                 | 
| 5 | Other (Specify) | 3 | 
                                    
                                    0.2%
                                 | 
| Sysmiss | 2 |