| Value | Category | Cases | |
|---|---|---|---|
| 1 | month and year | 7761 | 
                                    
                                    68.8%
                                 | 
| 2 | month and age -y imp | 23 | 
                                    
                                    0.2%
                                 | 
| 3 | year and age - m imp | 0 | 
                                    
                                    0%
                                 | 
| 4 | 0 | 
                                    
                                    0%
                                 | |
| 5 | year - a, m imp | 2740 | 
                                    
                                    24.3%
                                 | 
| 6 | age - y, m imp | 304 | 
                                    
                                    2.7%
                                 | 
| 7 | month - a, y imp | 22 | 
                                    
                                    0.2%
                                 | 
| 8 | none - all imp | 433 | 
                                    
                                    3.8%
                                 | 
| Sysmiss | 3663 |