| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 0 | Never | 641 | 
                                                                 
                                    
                                    53.4%
                                 
                                                             | 
                                                        
                    
| 1 | Just once or twice | 306 | 
                                                                 
                                    
                                    25.5%
                                 
                                                             | 
                                                        
                    
| 2 | Several times | 132 | 
                                                                 
                                    
                                    11%
                                 
                                                             | 
                                                        
                    
| 3 | Many times | 64 | 
                                                                 
                                    
                                    5.3%
                                 
                                                             | 
                                                        
                    
| 4 | Always | 49 | 
                                                                 
                                    
                                    4.1%
                                 
                                                             | 
                                                        
                    
| 8 | Refused | 6 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    
| 9 | Don't Know | 2 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             |