| Value | Category | Cases | |
|---|---|---|---|
| 1993 | 1 | 
                                
                                0%
                             | |
| 1994 | 1 | 
                                
                                0%
                             | |
| 1996 | 2 | 
                                
                                0%
                             | |
| 1997 | 1 | 
                                
                                0%
                             | |
| 1998 | 2 | 
                                
                                0%
                             | |
| 2000 | 3 | 
                                
                                0.1%
                             | |
| 2001 | 4 | 
                                
                                0.1%
                             | |
| 2002 | 9 | 
                                
                                0.2%
                             | |
| 2003 | 12 | 
                                
                                0.2%
                             | |
| 2004 | 8 | 
                                
                                0.2%
                             | |
| 2005 | 18 | 
                                
                                0.3%
                             | |
| 2006 | 36 | 
                                
                                0.7%
                             | |
| 2007 | 29 | 
                                
                                0.5%
                             | |
| 9995 | 9995.Missing | 2 | 
                                
                                0%
                             | 
| 9998 | 9998.Dont Know | 0 | 
                                
                                0%
                             | 
| 9999 | 9999.Not Applicable | 5161 | 
                                
                                97.6%
                             |