| Value | Category | Cases | |
|---|---|---|---|
| 2004 | 1 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| 2009 | 67 | 
                                                                 
                                    
                                    28.3%
                                 
                                                             | 
                                                        
                    |
| 2010 | 169 | 
                                                                 
                                    
                                    71.3%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 1150 |