| Value | Category | Cases | |
|---|---|---|---|
| 1 | 5 or more days a week | 76 | 
                                                                 
                                    
                                    11.1%
                                 
                                                             | 
                                                        
                    
| 2 | 1-4 days per week | 288 | 
                                                                 
                                    
                                    42.2%
                                 
                                                             | 
                                                        
                    
| 3 | 1-3 days a month | 175 | 
                                                                 
                                    
                                    25.7%
                                 
                                                             | 
                                                        
                    
| 4 | less than once a month | 143 | 
                                                                 
                                    
                                    21%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1931 |