| Value | Category | Cases | |
|---|---|---|---|
| 0 | 12 | 
                                                                 
                                    
                                    0.6%
                                 
                                                             | 
                                                        
                    |
| 1 | 3 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    |
| 2 | 1978 | 
                                                                 
                                    
                                    99.2%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 7 |