| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily | 613 | 
                                                                 
                                    
                                    10.1%
                                 
                                                             | 
                                                        
                    
| 2 | More than 4 times in a week | 497 | 
                                                                 
                                    
                                    8.2%
                                 
                                                             | 
                                                        
                    
| 3 | 4 times in a week | 635 | 
                                                                 
                                    
                                    10.4%
                                 
                                                             | 
                                                        
                    
| 4 | Less than 4 times in a week | 1534 | 
                                                                 
                                    
                                    25.2%
                                 
                                                             | 
                                                        
                    
| 5 | Never | 2804 | 
                                                                 
                                    
                                    46.1%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 3777 |