| Value | Category | Cases | |
|---|---|---|---|
| 0 | Phnom Penh and urban areas | 56 | 
                                    
                                    6.9%
                                 | 
| 1 | Plain | 279 | 
                                    
                                    34.4%
                                 | 
| 2 | Tonle Sap | 283 | 
                                    
                                    34.9%
                                 | 
| 3 | Coastal | 39 | 
                                    
                                    4.8%
                                 | 
| 4 | Plateau and Mountain | 155 | 
                                    
                                    19.1%
                                 |