| Value | Category | Cases | |
|---|---|---|---|
| 1 | Annually | 13 | 
                                                                 
                                    
                                    25%
                                 
                                                             | 
                                                        
                    
| 2 | EverySixMos | 8 | 
                                                                 
                                    
                                    15.4%
                                 
                                                             | 
                                                        
                    
| 3 | Monthly | 13 | 
                                                                 
                                    
                                    25%
                                 
                                                             | 
                                                        
                    
| 4 | Quarterly | 18 | 
                                                                 
                                    
                                    34.6%
                                 
                                                             | 
                                                        
                    
| Missing value | 2156 |