| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily | 2278 | 
                                                                 
                                    
                                    37.4%
                                 
                                                             | 
                                                        
                    
| 2 | More than 4 times in a week | 665 | 
                                                                 
                                    
                                    10.9%
                                 
                                                             | 
                                                        
                    
| 3 | 4 times in a week | 529 | 
                                                                 
                                    
                                    8.7%
                                 
                                                             | 
                                                        
                    
| 4 | Less than 4 times in a week | 1129 | 
                                                                 
                                    
                                    18.6%
                                 
                                                             | 
                                                        
                    
| 5 | Never | 1484 | 
                                                                 
                                    
                                    24.4%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 3775 |