| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 0 | Never | 2089 | 
                                                                 
                                    
                                    87%
                                 
                                                             | 
                                                        
                    
| 1 | Once | 183 | 
                                                                 
                                    
                                    7.6%
                                 
                                                             | 
                                                        
                    
| 2 | Twice | 62 | 
                                                                 
                                    
                                    2.6%
                                 
                                                             | 
                                                        
                    
| 3 | Three or more times | 63 | 
                                                                 
                                    
                                    2.6%
                                 
                                                             | 
                                                        
                    
| 8 | Refused | 1 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 9 | Don’t know | 2 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             |