Value | Category | Cases | |
---|---|---|---|
-9 | Don't know (spontaneous) | 2 |
0.3%
|
1970 | 1 |
0.2%
|
|
1978 | 1 |
0.2%
|
|
1979 | 2 |
0.3%
|
|
1980 | 2 |
0.3%
|
|
1989 | 2 |
0.3%
|
|
1990 | 5 |
0.8%
|
|
1991 | 1 |
0.2%
|
|
1992 | 5 |
0.8%
|
|
1993 | 1 |
0.2%
|
|
1994 | 5 |
0.8%
|
|
1995 | 6 |
1%
|
|
1996 | 4 |
0.7%
|
|
1998 | 8 |
1.3%
|
|
1999 | 5 |
0.8%
|
|
2000 | 20 |
3.3%
|
|
2001 | 6 |
1%
|
|
2002 | 11 |
1.8%
|
|
2003 | 10 |
1.6%
|
|
2004 | 13 |
2.1%
|
|
2005 | 17 |
2.8%
|
|
2006 | 12 |
2%
|
|
2007 | 11 |
1.8%
|
|
2008 | 14 |
2.3%
|
|
2009 | 18 |
2.9%
|
|
2010 | 23 |
3.8%
|
|
2011 | 12 |
2%
|
|
2012 | 22 |
3.6%
|
|
2013 | 30 |
4.9%
|
|
2014 | 40 |
6.5%
|
|
2015 | 41 |
6.7%
|
|
2016 | 45 |
7.4%
|
|
2017 | 54 |
8.8%
|
|
2018 | 80 |
13.1%
|
|
2019 | 43 |
7%
|
|
2020 | 28 |
4.6%
|
|
2021 | 12 |
2%
|