| Value | Category | Cases | |
|---|---|---|---|
| 1980 | 11 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    |
| 1981 | 2 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    |
| 1982 | 14 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    |
| 1983 | 20 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    |
| 1984 | 32 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    |
| 1985 | 42 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| 1986 | 73 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| 1987 | 99 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| 1988 | 206 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 1989 | 180 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 1990 | 354 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    |
| 1991 | 338 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    |
| 1992 | 510 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    |
| 1993 | 598 | 
                                                                 
                                    
                                    0.9%
                                 
                                                             | 
                                                        
                    |
| 1994 | 675 | 
                                                                 
                                    
                                    1%
                                 
                                                             | 
                                                        
                    |
| 1995 | 772 | 
                                                                 
                                    
                                    1.2%
                                 
                                                             | 
                                                        
                    |
| 1996 | 995 | 
                                                                 
                                    
                                    1.5%
                                 
                                                             | 
                                                        
                    |
| 1997 | 926 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 1998 | 1455 | 
                                                                 
                                    
                                    2.2%
                                 
                                                             | 
                                                        
                    |
| 1999 | 1275 | 
                                                                 
                                    
                                    1.9%
                                 
                                                             | 
                                                        
                    |
| 2000 | 2032 | 
                                                                 
                                    
                                    3.1%
                                 
                                                             | 
                                                        
                    |
| 2001 | 1638 | 
                                                                 
                                    
                                    2.5%
                                 
                                                             | 
                                                        
                    |
| 2002 | 1930 | 
                                                                 
                                    
                                    2.9%
                                 
                                                             | 
                                                        
                    |
| 2003 | 2082 | 
                                                                 
                                    
                                    3.2%
                                 
                                                             | 
                                                        
                    |
| 2004 | 2354 | 
                                                                 
                                    
                                    3.6%
                                 
                                                             | 
                                                        
                    |
| 2005 | 2354 | 
                                                                 
                                    
                                    3.6%
                                 
                                                             | 
                                                        
                    |
| 2006 | 2890 | 
                                                                 
                                    
                                    4.4%
                                 
                                                             | 
                                                        
                    |
| 2007 | 2364 | 
                                                                 
                                    
                                    3.6%
                                 
                                                             | 
                                                        
                    |
| 2008 | 3325 | 
                                                                 
                                    
                                    5%
                                 
                                                             | 
                                                        
                    |
| 2009 | 2856 | 
                                                                 
                                    
                                    4.3%
                                 
                                                             | 
                                                        
                    |
| 2010 | 3779 | 
                                                                 
                                    
                                    5.7%
                                 
                                                             | 
                                                        
                    |
| 2011 | 3749 | 
                                                                 
                                    
                                    5.7%
                                 
                                                             | 
                                                        
                    |
| 2012 | 3822 | 
                                                                 
                                    
                                    5.8%
                                 
                                                             | 
                                                        
                    |
| 2013 | 3652 | 
                                                                 
                                    
                                    5.5%
                                 
                                                             | 
                                                        
                    |
| 2014 | 4086 | 
                                                                 
                                    
                                    6.2%
                                 
                                                             | 
                                                        
                    |
| 2015 | 3948 | 
                                                                 
                                    
                                    6%
                                 
                                                             | 
                                                        
                    |
| 2016 | 3753 | 
                                                                 
                                    
                                    5.7%
                                 
                                                             | 
                                                        
                    |
| 2017 | 3082 | 
                                                                 
                                    
                                    4.7%
                                 
                                                             | 
                                                        
                    |
| 2018 | 3495 | 
                                                                 
                                    
                                    5.3%
                                 
                                                             | 
                                                        
                    |
| 2019 | 184 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 9997 | Inconsistent | 126 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    
| 9999 | NO RESPONSE | 2 | 
                                                                 
                                    
                                    0%
                                 
                                                             |