| Value | Category | Cases | |
|---|---|---|---|
| 1 | Month | 31 | 
                                                                 
                                    
                                    0.9%
                                 
                                                             | 
                                                        
                    
| 2 | Season | 1732 | 
                                                                 
                                    
                                    51.3%
                                 
                                                             | 
                                                        
                    
| 3 | Year | 1616 | 
                                                                 
                                    
                                    47.8%
                                 
                                                             | 
                                                        
                    
| 4 | Other (specify) | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 402 |