| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 0 | Never | 1604 | 
                                                                 
                                    
                                    66.8%
                                 
                                                             | 
                                                        
                    
| 1 | Just once or twice | 322 | 
                                                                 
                                    
                                    13.4%
                                 
                                                             | 
                                                        
                    
| 2 | Several times | 320 | 
                                                                 
                                    
                                    13.3%
                                 
                                                             | 
                                                        
                    
| 3 | Many times | 94 | 
                                                                 
                                    
                                    3.9%
                                 
                                                             | 
                                                        
                    
| 4 | Always | 45 | 
                                                                 
                                    
                                    1.9%
                                 
                                                             | 
                                                        
                    
| 9 | Don't Know | 15 | 
                                                                 
                                    
                                    0.6%
                                 
                                                             | 
                                                        
                    
| 998 | Refused | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             |