| Value | Category | Cases | |
|---|---|---|---|
| 1 | month and year | 14592 | 
                                    
                                    97.6%
                                 | 
| 2 | month and age -y imp | 23 | 
                                    
                                    0.2%
                                 | 
| 3 | year and age - m imp | 259 | 
                                    
                                    1.7%
                                 | 
| 4 | y & age - y ignored | 0 | 
                                    
                                    0%
                                 | 
| 5 | year - a, m imp | 0 | 
                                    
                                    0%
                                 | 
| 6 | age - y, m imp | 72 | 
                                    
                                    0.5%
                                 | 
| 7 | month - a, y imp | 0 | 
                                    
                                    0%
                                 | 
| 8 | none - all imp | 0 | 
                                    
                                    0%
                                 |