| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 0 | Never | 558 | 
                                                                 
                                    
                                    23.3%
                                 
                                                             | 
                                                        
                    
| 1 | Just once or twice | 496 | 
                                                                 
                                    
                                    20.7%
                                 
                                                             | 
                                                        
                    
| 2 | Several times | 610 | 
                                                                 
                                    
                                    25.4%
                                 
                                                             | 
                                                        
                    
| 3 | Many times | 536 | 
                                                                 
                                    
                                    22.3%
                                 
                                                             | 
                                                        
                    
| 4 | Always | 197 | 
                                                                 
                                    
                                    8.2%
                                 
                                                             | 
                                                        
                    
| 8 | Refused | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 9 | Don't Know | 3 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             |