| Value | Category | Cases | |
|---|---|---|---|
| 0 | No | 18327 | 
                                                                 
                                    
                                    96.3%
                                 
                                                             | 
                                                        
                    
| 1 | Yes | 694 | 
                                                                 
                                    
                                    3.6%
                                 
                                                             | 
                                                        
                    
| 99 | Not stated | 20 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 280382 |