| Value | Category | Cases | |
|---|---|---|---|
| 0 | No | 29 | 
                                                                 
                                    
                                    17.3%
                                 
                                                             | 
                                                        
                    
| 1 | Yes, more than once in the last six months | 100 | 
                                                                 
                                    
                                    59.5%
                                 
                                                             | 
                                                        
                    
| 2 | Yes, once in the last six months | 39 | 
                                                                 
                                    
                                    23.2%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 8921 |