| Value | Category | Cases | |
|---|---|---|---|
| 1 | GPS | 11 | 
                                                                 
                                    
                                    4.3%
                                 
                                                             | 
                                                        
                    
| 2 | land title | 74 | 
                                                                 
                                    
                                    29%
                                 
                                                             | 
                                                        
                    
| 3 | self-reported | 170 | 
                                                                 
                                    
                                    66.7%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 245 |