| Value | Category | Cases | |
|---|---|---|---|
| 0 | No | 3 | 
                                                                 
                                    
                                    9.7%
                                 
                                                             | 
                                                        
                    
| 1 | Yes, more than once in the last six months | 17 | 
                                                                 
                                    
                                    54.8%
                                 
                                                             | 
                                                        
                    
| 2 | Yes, once in the last six months | 11 | 
                                                                 
                                    
                                    35.5%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 9058 |