| Value | Category | Cases | |
|---|---|---|---|
| -999 | -999 | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| -888 | -888 | 23 | 
                                                                 
                                    
                                    2.5%
                                 
                                                             | 
                                                        
                    
| 0 | Never | 129 | 
                                                                 
                                    
                                    14.1%
                                 
                                                             | 
                                                        
                    
| 1 | Once a year (annually) | 52 | 
                                                                 
                                    
                                    5.7%
                                 
                                                             | 
                                                        
                    
| 2 | Twice a year (bi-annually) | 73 | 
                                                                 
                                    
                                    8%
                                 
                                                             | 
                                                        
                    
| 3 | 3-4 times a year (quarterly) | 237 | 
                                                                 
                                    
                                    26%
                                 
                                                             | 
                                                        
                    
| 4 | Every two months | 69 | 
                                                                 
                                    
                                    7.6%
                                 
                                                             | 
                                                        
                    
| 5 | Every month | 231 | 
                                                                 
                                    
                                    25.3%
                                 
                                                             | 
                                                        
                    
| 6 | Every two weeks | 30 | 
                                                                 
                                    
                                    3.3%
                                 
                                                             | 
                                                        
                    
| 7 | Every week | 25 | 
                                                                 
                                    
                                    2.7%
                                 
                                                             | 
                                                        
                    
| 8 | Everyday | 6 | 
                                                                 
                                    
                                    0.7%
                                 
                                                             | 
                                                        
                    
| 9 | Other | 37 | 
                                                                 
                                    
                                    4.1%
                                 
                                                             |