| Value | Category | Cases | |
|---|---|---|---|
| 1 | month and year | 1375 | 
                                    
                                    75.2%
                                 | 
| 2 | from calendar | 0 | 
                                    
                                    0%
                                 | 
| 5 | year | 339 | 
                                    
                                    18.5%
                                 | 
| 6 | 0 | 
                                    
                                    0%
                                 | |
| 7 | month | 11 | 
                                    
                                    0.6%
                                 | 
| 8 | none | 104 | 
                                    
                                    5.7%
                                 | 
| Sysmiss | 13117 |