| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 0 | Never | 2088 | 
                                                                 
                                    
                                    87%
                                 
                                                             | 
                                                        
                    
| 1 | Only once | 160 | 
                                                                 
                                    
                                    6.7%
                                 
                                                             | 
                                                        
                    
| 2 | A few times | 106 | 
                                                                 
                                    
                                    4.4%
                                 
                                                             | 
                                                        
                    
| 3 | Often | 45 | 
                                                                 
                                    
                                    1.9%
                                 
                                                             | 
                                                        
                    
| 9 | Don't know | 1 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 998 | Refused | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             |