| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 1 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    |
| 2001 | 84 | 
                                                                 
                                    
                                    2%
                                 
                                                             | 
                                                        
                    |
| 2002 | 358 | 
                                                                 
                                    
                                    8.5%
                                 
                                                             | 
                                                        
                    |
| 2003 | 592 | 
                                                                 
                                    
                                    14%
                                 
                                                             | 
                                                        
                    |
| 2004 | 868 | 
                                                                 
                                    
                                    20.5%
                                 
                                                             | 
                                                        
                    |
| 2005 | 1580 | 
                                                                 
                                    
                                    37.4%
                                 
                                                             | 
                                                        
                    |
| 2006 | 452 | 
                                                                 
                                    
                                    10.7%
                                 
                                                             | 
                                                        
                    |
| 9998 | 2 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    |
| 9999 | Missing | 291 | 
                                                                 
                                    
                                    6.9%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 18284 |