| Value | Category | Cases | |
|---|---|---|---|
| 1984 | 2 | 
                                    
                                    0%
                                 | |
| 1985 | 7 | 
                                    
                                    0%
                                 | |
| 1986 | 13 | 
                                    
                                    0%
                                 | |
| 1987 | 34 | 
                                    
                                    0.1%
                                 | |
| 1988 | 89 | 
                                    
                                    0.2%
                                 | |
| 1989 | 122 | 
                                    
                                    0.3%
                                 | |
| 1990 | 169 | 
                                    
                                    0.5%
                                 | |
| 1991 | 234 | 
                                    
                                    0.6%
                                 | |
| 1992 | 276 | 
                                    
                                    0.7%
                                 | |
| 1993 | 355 | 
                                    
                                    1%
                                 | |
| 1994 | 366 | 
                                    
                                    1%
                                 | |
| 1995 | 346 | 
                                    
                                    0.9%
                                 | |
| 1996 | 344 | 
                                    
                                    0.9%
                                 | |
| 1997 | 396 | 
                                    
                                    1.1%
                                 | |
| 1998 | 449 | 
                                    
                                    1.2%
                                 | |
| 1999 | 460 | 
                                    
                                    1.2%
                                 | |
| 2000 | 487 | 
                                    
                                    1.3%
                                 | |
| 2001 | 463 | 
                                    
                                    1.2%
                                 | |
| 2002 | 515 | 
                                    
                                    1.4%
                                 | |
| 2003 | 558 | 
                                    
                                    1.5%
                                 | |
| 2004 | 624 | 
                                    
                                    1.7%
                                 | |
| 2005 | 693 | 
                                    
                                    1.9%
                                 | |
| 2006 | 711 | 
                                    
                                    1.9%
                                 | |
| 2007 | 733 | 
                                    
                                    2%
                                 | |
| 2008 | 776 | 
                                    
                                    2.1%
                                 | |
| 2009 | 799 | 
                                    
                                    2.1%
                                 | |
| 2010 | 854 | 
                                    
                                    2.3%
                                 | |
| 2011 | 840 | 
                                    
                                    2.3%
                                 | |
| 2012 | 889 | 
                                    
                                    2.4%
                                 | |
| 2013 | 871 | 
                                    
                                    2.3%
                                 | |
| 2014 | 868 | 
                                    
                                    2.3%
                                 | |
| 2015 | 858 | 
                                    
                                    2.3%
                                 | |
| 2016 | 842 | 
                                    
                                    2.3%
                                 | |
| 2017 | 803 | 
                                    
                                    2.2%
                                 | |
| 2018 | 736 | 
                                    
                                    2%
                                 | |
| 2019 | 70 | 
                                    
                                    0.2%
                                 | |
| 9998 | NSP | 9 | 
                                    
                                    0%
                                 | 
| 9999 | NON REPONSE | 1 | 
                                    
                                    0%
                                 | 
| Sysmiss | 19565 | 
                                    
                                    52.6%
                                 |