| Value | Category | Cases | |
|---|---|---|---|
| 0 | No | 4 | 
                                                                 
                                    
                                    10.8%
                                 
                                                             | 
                                                        
                    
| 1 | Yes, more than once in the last six months | 31 | 
                                                                 
                                    
                                    83.8%
                                 
                                                             | 
                                                        
                    
| 2 | Yes, once in the last six months | 2 | 
                                                                 
                                    
                                    5.4%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 9052 |