| Value | Category | Cases | |
|---|---|---|---|
| 0 | No | 810 | 
                                                                 
                                    
                                    22.9%
                                 
                                                             | 
                                                        
                    
| 1 | Yes, more than once in the last six months | 1816 | 
                                                                 
                                    
                                    51.3%
                                 
                                                             | 
                                                        
                    
| 2 | Yes, once in the last six months | 913 | 
                                                                 
                                    
                                    25.8%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 5550 |