| Value | Category | Cases | |
|---|---|---|---|
| -999 | -999 | 2 | 
                                                                 
                                    
                                    0.7%
                                 
                                                             | 
                                                        
                    
| -888 | -888 | 7 | 
                                                                 
                                    
                                    2.4%
                                 
                                                             | 
                                                        
                    
| -777 | Not Applicable | 25 | 
                                                                 
                                    
                                    8.5%
                                 
                                                             | 
                                                        
                    
| 0 | No | 61 | 
                                                                 
                                    
                                    20.8%
                                 
                                                             | 
                                                        
                    
| 1 | Yes | 198 | 
                                                                 
                                    
                                    67.6%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 619 |