| Value | Category | Cases | |
|---|---|---|---|
| 1 | 20PHL009 | 3 | 
                                    
                                    0.1%
                                 | 
| 2 | 20PHL015 | 271 | 
                                    
                                    11.8%
                                 | 
| Missing value | 2017 | 
                                    
                                    88%
                                 |