Value | Category | Cases | |
---|---|---|---|
-9 | Don't know (spontaneous) | 274 |
8.8%
|
1972 | 1 |
0%
|
|
1974 | 2 |
0.1%
|
|
1975 | 2 |
0.1%
|
|
1978 | 1 |
0%
|
|
1979 | 1 |
0%
|
|
1982 | 1 |
0%
|
|
1984 | 1 |
0%
|
|
1985 | 2 |
0.1%
|
|
1986 | 1 |
0%
|
|
1987 | 2 |
0.1%
|
|
1990 | 5 |
0.2%
|
|
1991 | 3 |
0.1%
|
|
1992 | 3 |
0.1%
|
|
1993 | 4 |
0.1%
|
|
1994 | 1 |
0%
|
|
1996 | 3 |
0.1%
|
|
1997 | 2 |
0.1%
|
|
1998 | 1 |
0%
|
|
1999 | 3 |
0.1%
|
|
2000 | 16 |
0.5%
|
|
2001 | 5 |
0.2%
|
|
2002 | 4 |
0.1%
|
|
2003 | 7 |
0.2%
|
|
2004 | 3 |
0.1%
|
|
2005 | 4 |
0.1%
|
|
2006 | 3 |
0.1%
|
|
2007 | 3 |
0.1%
|
|
2008 | 13 |
0.4%
|
|
2009 | 9 |
0.3%
|
|
2010 | 48 |
1.5%
|
|
2011 | 7 |
0.2%
|
|
2012 | 19 |
0.6%
|
|
2013 | 25 |
0.8%
|
|
2014 | 25 |
0.8%
|
|
2015 | 84 |
2.7%
|
|
2016 | 47 |
1.5%
|
|
2017 | 60 |
1.9%
|
|
2018 | 148 |
4.8%
|
|
2019 | 221 |
7.1%
|
|
2020 | 393 |
12.7%
|
|
2021 | 356 |
11.5%
|
|
2022 | 517 |
16.7%
|
|
2023 | 775 |
25%
|