| Value | Category | Cases | |
|---|---|---|---|
| 0 | 2012 | 
                                                                 
                                    
                                    69%
                                 
                                                             | 
                                                        
                    |
| 1 | 903 | 
                                                                 
                                    
                                    31%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 94 |