| Value | Category | Cases | |
|---|---|---|---|
| 1 | Month and year | 1929 | 
                                                         
                                
                                94.3%
                                                             
                                                     | 
                                            
| 2 | From calendar | 0 | 
                                                         
                                
                                0%
                                                             
                                                     | 
                                            
| 5 | Year | 116 | 
                                                         
                                
                                5.7%
                                                             
                                                     | 
                                            
| 7 | Month | 0 | 
                                                         
                                
                                0%
                                                             
                                                     | 
                                            
| 8 | None | 0 | 
                                                         
                                
                                0%
                                                             
                                                     | 
                                            
| Sysmiss | 4071 |