| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 0 | Never | 1037 | 
                                                                 
                                    
                                    86.4%
                                 
                                                             | 
                                                        
                    
| 1 | Once or twice | 105 | 
                                                                 
                                    
                                    8.8%
                                 
                                                             | 
                                                        
                    
| 2 | Several times | 40 | 
                                                                 
                                    
                                    3.3%
                                 
                                                             | 
                                                        
                    
| 3 | Many times | 17 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    
| 8 | Refused | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 9 | Don't know | 1 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             |