Value | Category | Cases | |
---|---|---|---|
-9 | Don't know (spontaneous) | 0 |
0%
|
1982 | 1 |
0.4%
|
|
1987 | 1 |
0.4%
|
|
1992 | 1 |
0.4%
|
|
1993 | 2 |
0.8%
|
|
1994 | 2 |
0.8%
|
|
1995 | 2 |
0.8%
|
|
1997 | 2 |
0.8%
|
|
1998 | 3 |
1.2%
|
|
1999 | 5 |
2%
|
|
2000 | 14 |
5.6%
|
|
2001 | 2 |
0.8%
|
|
2002 | 3 |
1.2%
|
|
2003 | 3 |
1.2%
|
|
2004 | 6 |
2.4%
|
|
2005 | 7 |
2.8%
|
|
2006 | 6 |
2.4%
|
|
2007 | 3 |
1.2%
|
|
2008 | 4 |
1.6%
|
|
2009 | 11 |
4.4%
|
|
2010 | 18 |
7.2%
|
|
2011 | 10 |
4%
|
|
2012 | 10 |
4%
|
|
2013 | 21 |
8.4%
|
|
2014 | 29 |
11.6%
|
|
2015 | 34 |
13.6%
|
|
2016 | 33 |
13.2%
|
|
2017 | 11 |
4.4%
|
|
2018 | 4 |
1.6%
|
|
2019 | 2 |
0.8%
|