| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily | 218 | 
                                                                 
                                    
                                    55.2%
                                 
                                                             | 
                                                        
                    
| 2 | Twice a week | 17 | 
                                                                 
                                    
                                    4.3%
                                 
                                                             | 
                                                        
                    
| 3 | Once a week | 33 | 
                                                                 
                                    
                                    8.4%
                                 
                                                             | 
                                                        
                    
| 6 | Others | 100 | 
                                                                 
                                    
                                    25.3%
                                 
                                                             | 
                                                        
                    
| 7 | 27 | 
                                                                 
                                    
                                    6.8%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 10521 |