| Value | Category | Cases | |
|---|---|---|---|
| 1 | Month and year | 13780 | 
                                                                 
                                    
                                    99.2%
                                 
                                                             | 
                                                        
                    
| 2 | Month and age -y imp | 5 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 3 | Year and age - m imp | 47 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    
| 4 | Y & age - y ignored | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 5 | Year - a, m imp | 18 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    
| 6 | Age - y, m imp | 11 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    
| 7 | Month - a, y imp | 3 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 8 | None - all imp | 26 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             |