| Value | Category | Cases | |
|---|---|---|---|
| 1995 | 1 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    |
| 1996 | 4 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    |
| 1997 | 6 | 
                                                                 
                                    
                                    1.2%
                                 
                                                             | 
                                                        
                    |
| 1998 | 5 | 
                                                                 
                                    
                                    1%
                                 
                                                             | 
                                                        
                    |
| 1999 | 18 | 
                                                                 
                                    
                                    3.7%
                                 
                                                             | 
                                                        
                    |
| 2000 | 17 | 
                                                                 
                                    
                                    3.5%
                                 
                                                             | 
                                                        
                    |
| 2001 | 33 | 
                                                                 
                                    
                                    6.8%
                                 
                                                             | 
                                                        
                    |
| 2002 | 44 | 
                                                                 
                                    
                                    9.1%
                                 
                                                             | 
                                                        
                    |
| 2003 | 62 | 
                                                                 
                                    
                                    12.8%
                                 
                                                             | 
                                                        
                    |
| 2004 | 91 | 
                                                                 
                                    
                                    18.8%
                                 
                                                             | 
                                                        
                    |
| 2005 | 116 | 
                                                                 
                                    
                                    24%
                                 
                                                             | 
                                                        
                    |
| 2006 | 84 | 
                                                                 
                                    
                                    17.4%
                                 
                                                             | 
                                                        
                    |
| 2007 | 3 | 
                                                                 
                                    
                                    0.6%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 438 |