| Value | Category | Cases | |
|---|---|---|---|
| 0 | No | 154 | 
                                                                 
                                    
                                    25.6%
                                 
                                                             | 
                                                        
                    
| 1 | Yes, more than once in the last six months | 349 | 
                                                                 
                                    
                                    58.1%
                                 
                                                             | 
                                                        
                    
| 2 | Yes, once in the last six months | 98 | 
                                                                 
                                    
                                    16.3%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 8488 |