Value | Category | Cases | |
---|---|---|---|
-9 | Don't know (spontaneous) | 14 |
0.8%
|
1832 | 1 |
0.1%
|
|
1906 | 1 |
0.1%
|
|
1912 | 1 |
0.1%
|
|
1922 | 1 |
0.1%
|
|
1928 | 1 |
0.1%
|
|
1931 | 1 |
0.1%
|
|
1933 | 1 |
0.1%
|
|
1945 | 1 |
0.1%
|
|
1947 | 1 |
0.1%
|
|
1949 | 1 |
0.1%
|
|
1950 | 1 |
0.1%
|
|
1953 | 1 |
0.1%
|
|
1955 | 2 |
0.1%
|
|
1956 | 1 |
0.1%
|
|
1957 | 1 |
0.1%
|
|
1960 | 1 |
0.1%
|
|
1964 | 1 |
0.1%
|
|
1969 | 2 |
0.1%
|
|
1970 | 2 |
0.1%
|
|
1971 | 1 |
0.1%
|
|
1972 | 3 |
0.2%
|
|
1973 | 1 |
0.1%
|
|
1975 | 15 |
0.9%
|
|
1976 | 2 |
0.1%
|
|
1977 | 4 |
0.2%
|
|
1978 | 2 |
0.1%
|
|
1979 | 1 |
0.1%
|
|
1980 | 10 |
0.6%
|
|
1981 | 5 |
0.3%
|
|
1982 | 8 |
0.5%
|
|
1983 | 7 |
0.4%
|
|
1984 | 6 |
0.3%
|
|
1985 | 7 |
0.4%
|
|
1986 | 4 |
0.2%
|
|
1987 | 4 |
0.2%
|
|
1988 | 7 |
0.4%
|
|
1989 | 32 |
1.9%
|
|
1990 | 32 |
1.9%
|
|
1991 | 51 |
3%
|
|
1992 | 44 |
2.6%
|
|
1993 | 51 |
3%
|
|
1994 | 30 |
1.7%
|
|
1995 | 47 |
2.7%
|
|
1996 | 49 |
2.8%
|
|
1997 | 41 |
2.4%
|
|
1998 | 37 |
2.1%
|
|
1999 | 37 |
2.1%
|
|
2000 | 54 |
3.1%
|
|
2001 | 91 |
5.3%
|
|
2002 | 86 |
5%
|
|
2003 | 65 |
3.8%
|
|
2004 | 46 |
2.7%
|
|
2005 | 58 |
3.4%
|
|
2006 | 35 |
2%
|
|
2007 | 34 |
2%
|
|
2008 | 44 |
2.6%
|
|
2009 | 31 |
1.8%
|
|
2010 | 59 |
3.4%
|
|
2011 | 39 |
2.3%
|
|
2012 | 41 |
2.4%
|
|
2013 | 38 |
2.2%
|
|
2014 | 59 |
3.4%
|
|
2015 | 80 |
4.6%
|
|
2016 | 50 |
2.9%
|
|
2017 | 56 |
3.2%
|
|
2018 | 53 |
3.1%
|
|
2019 | 23 |
1.3%
|
|
2020 | 33 |
1.9%
|
|
2021 | 28 |
1.6%
|
|
2022 | 26 |
1.5%
|
|
2023 | 18 |
1%
|
|
2024 | 4 |
0.2%
|