| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1986 | 1 | 
                                    
                                    0%
                                 | 
| 2 | 1990 | 2 | 
                                    
                                    0.1%
                                 | 
| 3 | 1991 | 7 | 
                                    
                                    0.2%
                                 | 
| 4 | 1992 | 51 | 
                                    
                                    1.6%
                                 | 
| 5 | 1993 | 1 | 
                                    
                                    0%
                                 | 
| 6 | 1994 | 13 | 
                                    
                                    0.4%
                                 | 
| 7 | 1995 | 5 | 
                                    
                                    0.2%
                                 | 
| 8 | 1996 | 12 | 
                                    
                                    0.4%
                                 | 
| 9 | 1997 | 8 | 
                                    
                                    0.3%
                                 | 
| 10 | 1998 | 23 | 
                                    
                                    0.7%
                                 | 
| 11 | 1999 | 6 | 
                                    
                                    0.2%
                                 | 
| 12 | 2000 | 30 | 
                                    
                                    0.9%
                                 | 
| 13 | 2001 | 6 | 
                                    
                                    0.2%
                                 | 
| 14 | 2002 | 21 | 
                                    
                                    0.7%
                                 | 
| 15 | 2003 | 25 | 
                                    
                                    0.8%
                                 | 
| 16 | 2004 | 46 | 
                                    
                                    1.4%
                                 | 
| 17 | 2005 | 29 | 
                                    
                                    0.9%
                                 | 
| 18 | 2006 | 52 | 
                                    
                                    1.6%
                                 | 
| 19 | 2007 | 43 | 
                                    
                                    1.4%
                                 | 
| 20 | 2008 | 63 | 
                                    
                                    2%
                                 | 
| 21 | 2009 | 93 | 
                                    
                                    2.9%
                                 | 
| 22 | 2010 | 95 | 
                                    
                                    3%
                                 | 
| 23 | 2011 | 139 | 
                                    
                                    4.4%
                                 | 
| 24 | 2012 | 165 | 
                                    
                                    5.2%
                                 | 
| 25 | 2013 | 115 | 
                                    
                                    3.6%
                                 | 
| 26 | 2014 | 122 | 
                                    
                                    3.8%
                                 | 
| 27 | 2015 | 90 | 
                                    
                                    2.8%
                                 | 
| 28 | 2016 | 389 | 
                                    
                                    12.2%
                                 | 
| 29 | 2017 | 678 | 
                                    
                                    21.3%
                                 | 
| 30 | 2018 | 104 | 
                                    
                                    3.3%
                                 | 
| 31 | 2019 | 66 | 
                                    
                                    2.1%
                                 | 
| 32 | 2020 | 15 | 
                                    
                                    0.5%
                                 | 
| Missing value | 668 | 
                                    
                                    21%
                                 |