| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 0 | Never | 461 | 
                                                                 
                                    
                                    34.1%
                                 
                                                             | 
                                                        
                    
| 1 | Just once or twice | 168 | 
                                                                 
                                    
                                    12.4%
                                 
                                                             | 
                                                        
                    
| 2 | Several times | 409 | 
                                                                 
                                    
                                    30.3%
                                 
                                                             | 
                                                        
                    
| 3 | Many times | 277 | 
                                                                 
                                    
                                    20.5%
                                 
                                                             | 
                                                        
                    
| 4 | Always | 32 | 
                                                                 
                                    
                                    2.4%
                                 
                                                             | 
                                                        
                    
| 9 | Don't Know | 3 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    
| 998 | Refused | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             |