| Value | Category | Cases | |
|---|---|---|---|
| 1 | weekly | 6 | 
                                                                 
                                    
                                    25%
                                 
                                                             | 
                                                        
                    
| 2 | biweekly | 3 | 
                                                                 
                                    
                                    12.5%
                                 
                                                             | 
                                                        
                    
| 3 | monthly | 5 | 
                                                                 
                                    
                                    20.8%
                                 
                                                             | 
                                                        
                    
| 4 | biannually | 8 | 
                                                                 
                                    
                                    33.3%
                                 
                                                             | 
                                                        
                    
| 5 | annually | 1 | 
                                                                 
                                    
                                    4.2%
                                 
                                                             | 
                                                        
                    
| 6 | never | 1 | 
                                                                 
                                    
                                    4.2%
                                 
                                                             | 
                                                        
                    
| 7 | other | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 8 | daily | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 9 | quarterly | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1369 |