| Value | Category | Cases | |
|---|---|---|---|
| 1 | month and year | 4181 | 
                                    
                                    83.8%
                                 | 
| 2 | month and age -y imp | 12 | 
                                    
                                    0.2%
                                 | 
| 3 | year and age - m imp out | 0 | 
                                    
                                    0%
                                 | 
| 5 | year - a, m imp | 704 | 
                                    
                                    14.1%
                                 | 
| 6 | age - y, m imp | 53 | 
                                    
                                    1.1%
                                 | 
| 7 | month - a, y imp | 13 | 
                                    
                                    0.3%
                                 | 
| 8 | none - all imp | 29 | 
                                    
                                    0.6%
                                 | 
| 11 | .Z | 3247 |