| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 990 | 
                                                                 
                                    
                                    16.5%
                                 
                                                             | 
                                                        
                    
| 2 | Once or twice in the past month | 1085 | 
                                                                 
                                    
                                    18.1%
                                 
                                                             | 
                                                        
                    
| 3 | About once a week | 939 | 
                                                                 
                                    
                                    15.7%
                                 
                                                             | 
                                                        
                    
| 4 | 2 or 3 times a week | 979 | 
                                                                 
                                    
                                    16.3%
                                 
                                                             | 
                                                        
                    
| 5 | Almost everyday | 1182 | 
                                                                 
                                    
                                    19.7%
                                 
                                                             | 
                                                        
                    
| 6 | Everyday | 815 | 
                                                                 
                                    
                                    13.6%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1171 |