| Value | Category | Cases | |
|---|---|---|---|
| 0 | nr | 0 | 
                                    
                                    0%
                                 | 
| 1 | at least once a day | 954 | 
                                    
                                    32.3%
                                 | 
| 2 | at least once a week | 1262 | 
                                    
                                    42.7%
                                 | 
| 3 | least often than once a week | 696 | 
                                    
                                    23.6%
                                 | 
| 4 | never | 42 | 
                                    
                                    1.4%
                                 | 
| Sysmiss | 46 |