| Value | Category | Cases | |
|---|---|---|---|
| 1994 | 325 | 
                                                                 
                                    
                                    10.5%
                                 
                                                             | 
                                                        
                    |
| 1995 | 772 | 
                                                                 
                                    
                                    25%
                                 
                                                             | 
                                                        
                    |
| 1996 | 736 | 
                                                                 
                                    
                                    23.9%
                                 
                                                             | 
                                                        
                    |
| 1997 | 515 | 
                                                                 
                                    
                                    16.7%
                                 
                                                             | 
                                                        
                    |
| 1998 | 303 | 
                                                                 
                                    
                                    9.8%
                                 
                                                             | 
                                                        
                    |
| 1999 | 329 | 
                                                                 
                                    
                                    10.7%
                                 
                                                             | 
                                                        
                    |
| 2000 | 104 | 
                                                                 
                                    
                                    3.4%
                                 
                                                             | 
                                                        
                    |
| 9997 | inconsistent | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 9998 | dk | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 9152 |