| Value | Category | Cases | |
|---|---|---|---|
| 1 | Regularly | 920 | 
                                                                 
                                    
                                    9.9%
                                 
                                                             | 
                                                        
                    
| 2 | Often | 1257 | 
                                                                 
                                    
                                    13.6%
                                 
                                                             | 
                                                        
                    
| 3 | Sometimes | 1840 | 
                                                                 
                                    
                                    19.9%
                                 
                                                             | 
                                                        
                    
| 4 | Rarely | 1691 | 
                                                                 
                                    
                                    18.3%
                                 
                                                             | 
                                                        
                    
| 5 | Never | 3549 | 
                                                                 
                                    
                                    38.3%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 603 |