| Value | Category | Cases | |
|---|---|---|---|
| -999 | -999 | 1 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    
| -888 | -888 | 6 | 
                                                                 
                                    
                                    2.2%
                                 
                                                             | 
                                                        
                    
| -777 | Not Applicable | 22 | 
                                                                 
                                    
                                    7.9%
                                 
                                                             | 
                                                        
                    
| 0 | No | 58 | 
                                                                 
                                    
                                    20.8%
                                 
                                                             | 
                                                        
                    
| 1 | Yes | 192 | 
                                                                 
                                    
                                    68.8%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 633 |