| Value | Category | Cases | |
|---|---|---|---|
| 2006 | 10 | 
                                                                 
                                    
                                    4.1%
                                 
                                                             | 
                                                        
                    |
| 2007 | 127 | 
                                                                 
                                    
                                    52%
                                 
                                                             | 
                                                        
                    |
| 2008 | 107 | 
                                                                 
                                    
                                    43.9%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 378 |