| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 0 | Never | 1200 | 
                                                                 
                                    
                                    50%
                                 
                                                             | 
                                                        
                    
| 1 | Just once or twice | 381 | 
                                                                 
                                    
                                    15.9%
                                 
                                                             | 
                                                        
                    
| 2 | Several times | 328 | 
                                                                 
                                    
                                    13.7%
                                 
                                                             | 
                                                        
                    
| 3 | Many times | 247 | 
                                                                 
                                    
                                    10.3%
                                 
                                                             | 
                                                        
                    
| 4 | Always | 244 | 
                                                                 
                                    
                                    10.2%
                                 
                                                             | 
                                                        
                    
| 8 | Refused | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 9 | Don't Know | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             |