| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 0 | Never | 552 | 
                                                                 
                                    
                                    45.7%
                                 
                                                             | 
                                                        
                    
| 1 | Just once or twice | 189 | 
                                                                 
                                    
                                    15.6%
                                 
                                                             | 
                                                        
                    
| 2 | Several times | 278 | 
                                                                 
                                    
                                    23%
                                 
                                                             | 
                                                        
                    
| 3 | Many times | 158 | 
                                                                 
                                    
                                    13.1%
                                 
                                                             | 
                                                        
                    
| 4 | Always | 17 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    
| 9 | Don't Know | 14 | 
                                                                 
                                    
                                    1.2%
                                 
                                                             | 
                                                        
                    
| 998 | Refused | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             |