| Value | Category | Cases | |
|---|---|---|---|
| 0 | Less than once a month | 156 | 
                                                                 
                                    
                                    5.1%
                                 
                                                             | 
                                                        
                    
| 1 | 1-2 times per month | 487 | 
                                                                 
                                    
                                    15.9%
                                 
                                                             | 
                                                        
                    
| 2 | Once per week | 585 | 
                                                                 
                                    
                                    19%
                                 
                                                             | 
                                                        
                    
| 3 | 2-3 per week | 1376 | 
                                                                 
                                    
                                    44.8%
                                 
                                                             | 
                                                        
                    
| 4 | (Almost) every day | 468 | 
                                                                 
                                    
                                    15.2%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 6017 |