| Value | Category | Cases | |
|---|---|---|---|
| -1 | 490 | 
                                                                 
                                    
                                    3%
                                 
                                                             | 
                                                        
                    |
| 0 | 3831 | 
                                                                 
                                    
                                    23.3%
                                 
                                                             | 
                                                        
                    |
| 1 | 12130 | 
                                                                 
                                    
                                    73.7%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 119 |