| Value | Category | Cases | |
|---|---|---|---|
| 2006 | 44 | 
                                                                 
                                    
                                    9.1%
                                 
                                                             | 
                                                        
                    |
| 2007 | 237 | 
                                                                 
                                    
                                    48.9%
                                 
                                                             | 
                                                        
                    |
| 2008 | 204 | 
                                                                 
                                    
                                    42.1%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 137 |