| Value | Category | Cases | |
|---|---|---|---|
| 0 | No | 973 | 
                                                                 
                                    
                                    99.9%
                                 
                                                             | 
                                                        
                    
| 1 | Yes | 1 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    
| 8 | Don't know | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 9420 |