| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 0 | Never | 915 | 
                                                                 
                                    
                                    38.1%
                                 
                                                             | 
                                                        
                    
| 1 | Just once or twice | 501 | 
                                                                 
                                    
                                    20.9%
                                 
                                                             | 
                                                        
                    
| 2 | Several times | 602 | 
                                                                 
                                    
                                    25.1%
                                 
                                                             | 
                                                        
                    
| 3 | Many times | 266 | 
                                                                 
                                    
                                    11.1%
                                 
                                                             | 
                                                        
                    
| 4 | Always | 83 | 
                                                                 
                                    
                                    3.5%
                                 
                                                             | 
                                                        
                    
| 9 | Don't Know | 33 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    
| 998 | Refused | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             |