| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily | 398 | 
                                                                 
                                    
                                    6.5%
                                 
                                                             | 
                                                        
                    
| 2 | More than 4 times in a week | 238 | 
                                                                 
                                    
                                    3.9%
                                 
                                                             | 
                                                        
                    
| 3 | 4 times in a week | 310 | 
                                                                 
                                    
                                    5.1%
                                 
                                                             | 
                                                        
                    
| 4 | Less than 4 times in a week | 608 | 
                                                                 
                                    
                                    10%
                                 
                                                             | 
                                                        
                    
| 5 | Never | 4528 | 
                                                                 
                                    
                                    74.4%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 3778 |