| Value | Category | Cases | |
|---|---|---|---|
| 1 | month and year | 4036 | 
                                                                 
                                    
                                    92.8%
                                 
                                                             | 
                                                        
                    
| 2 | month and age -y imp | 3 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    
| 3 | year and age - m imp | 276 | 
                                                                 
                                    
                                    6.3%
                                 
                                                             | 
                                                        
                    
| 4 | y & age - y ignored | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 5 | year - a, m imp | 6 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    
| 6 | age - y, m imp | 30 | 
                                                                 
                                    
                                    0.7%
                                 
                                                             | 
                                                        
                    
| 7 | month - a, y imp | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 8 | none - all imp | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 2130 |