| Value | Category | Cases | |
|---|---|---|---|
| -999 | -999 | 2 | 
                                                                 
                                    
                                    1%
                                 
                                                             | 
                                                        
                    
| -888 | -888 | 6 | 
                                                                 
                                    
                                    3%
                                 
                                                             | 
                                                        
                    
| -777 | Not Applicable | 19 | 
                                                                 
                                    
                                    9.5%
                                 
                                                             | 
                                                        
                    
| 0 | No | 32 | 
                                                                 
                                    
                                    16.1%
                                 
                                                             | 
                                                        
                    
| 1 | Yes | 140 | 
                                                                 
                                    
                                    70.4%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 713 |