| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 0 | Never | 1975 | 
                                                                 
                                    
                                    83.6%
                                 
                                                             | 
                                                        
                    
| 1 | Just once or twice | 209 | 
                                                                 
                                    
                                    8.8%
                                 
                                                             | 
                                                        
                    
| 2 | Several times | 102 | 
                                                                 
                                    
                                    4.3%
                                 
                                                             | 
                                                        
                    
| 3 | Many times | 43 | 
                                                                 
                                    
                                    1.8%
                                 
                                                             | 
                                                        
                    
| 4 | Always | 30 | 
                                                                 
                                    
                                    1.3%
                                 
                                                             | 
                                                        
                    
| 9 | Don't Know | 4 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    
| 998 | Refused | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             |