| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 0 | Never | 930 | 
                                                                 
                                    
                                    68.9%
                                 
                                                             | 
                                                        
                    
| 1 | Just once or twice | 80 | 
                                                                 
                                    
                                    5.9%
                                 
                                                             | 
                                                        
                    
| 2 | Several times | 159 | 
                                                                 
                                    
                                    11.8%
                                 
                                                             | 
                                                        
                    
| 3 | Many times | 127 | 
                                                                 
                                    
                                    9.4%
                                 
                                                             | 
                                                        
                    
| 4 | Always | 52 | 
                                                                 
                                    
                                    3.9%
                                 
                                                             | 
                                                        
                    
| 9 | Don't Know | 2 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    
| 998 | Refused | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             |