| Value | Category | Cases | |
|---|---|---|---|
| 1 | never | 10668 | 
                                                                 
                                    
                                    81.2%
                                 
                                                             | 
                                                        
                    
| 2 | once or less than than once a month | 884 | 
                                                                 
                                    
                                    6.7%
                                 
                                                             | 
                                                        
                    
| 3 | every other month | 417 | 
                                                                 
                                    
                                    3.2%
                                 
                                                             | 
                                                        
                    
| 4 | every month | 410 | 
                                                                 
                                    
                                    3.1%
                                 
                                                             | 
                                                        
                    
| 5 | every week | 385 | 
                                                                 
                                    
                                    2.9%
                                 
                                                             | 
                                                        
                    
| 6 | everyday | 374 | 
                                                                 
                                    
                                    2.8%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 6141 |