| Value | Category | Cases | |
|---|---|---|---|
| 2010 | 2 | 
                                                                 
                                    
                                    5.7%
                                 
                                                             | 
                                                        
                    |
| 2011 | 8 | 
                                                                 
                                    
                                    22.9%
                                 
                                                             | 
                                                        
                    |
| 2012 | 25 | 
                                                                 
                                    
                                    71.4%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 3541 |