| Value | Category | Cases | |
|---|---|---|---|
| 1995 | 5 | 
                                                                 
                                    
                                    1.6%
                                 
                                                             | 
                                                        
                    |
| 1996 | 34 | 
                                                                 
                                    
                                    11%
                                 
                                                             | 
                                                        
                    |
| 1997 | 45 | 
                                                                 
                                    
                                    14.6%
                                 
                                                             | 
                                                        
                    |
| 1998 | 57 | 
                                                                 
                                    
                                    18.4%
                                 
                                                             | 
                                                        
                    |
| 1999 | 75 | 
                                                                 
                                    
                                    24.3%
                                 
                                                             | 
                                                        
                    |
| 2000 | 93 | 
                                                                 
                                    
                                    30.1%
                                 
                                                             | 
                                                        
                    |
| 9997 | inconsistent | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 9998 | dk | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 6083 |