| Value | Category | Cases | |
|---|---|---|---|
| 1 | Within the past year | 142 | 
                                                                 
                                    
                                    23.9%
                                 
                                                             | 
                                                        
                    
| 2 | More than 1 year ago | 85 | 
                                                                 
                                    
                                    14.3%
                                 
                                                             | 
                                                        
                    
| 3 | Never | 362 | 
                                                                 
                                    
                                    60.9%
                                 
                                                             | 
                                                        
                    
| 77 | Don't know | 5 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 3458 |