Value | Category | Cases | |
---|---|---|---|
-9 | Don't know (spontaneous) | 44 |
2.6%
|
-7 | Never regiestered (spontaneous) | 0 |
0%
|
1920 | 1 |
0.1%
|
|
1923 | 1 |
0.1%
|
|
1926 | 2 |
0.1%
|
|
1930 | 2 |
0.1%
|
|
1932 | 1 |
0.1%
|
|
1934 | 1 |
0.1%
|
|
1940 | 1 |
0.1%
|
|
1941 | 1 |
0.1%
|
|
1945 | 1 |
0.1%
|
|
1946 | 1 |
0.1%
|
|
1950 | 4 |
0.2%
|
|
1952 | 1 |
0.1%
|
|
1953 | 2 |
0.1%
|
|
1954 | 4 |
0.2%
|
|
1955 | 1 |
0.1%
|
|
1956 | 1 |
0.1%
|
|
1957 | 1 |
0.1%
|
|
1959 | 1 |
0.1%
|
|
1960 | 4 |
0.2%
|
|
1961 | 1 |
0.1%
|
|
1962 | 1 |
0.1%
|
|
1963 | 2 |
0.1%
|
|
1964 | 3 |
0.2%
|
|
1965 | 4 |
0.2%
|
|
1966 | 2 |
0.1%
|
|
1967 | 4 |
0.2%
|
|
1968 | 6 |
0.4%
|
|
1969 | 4 |
0.2%
|
|
1970 | 11 |
0.7%
|
|
1971 | 2 |
0.1%
|
|
1972 | 9 |
0.5%
|
|
1973 | 6 |
0.4%
|
|
1974 | 5 |
0.3%
|
|
1975 | 1 |
0.1%
|
|
1976 | 12 |
0.7%
|
|
1977 | 10 |
0.6%
|
|
1978 | 21 |
1.3%
|
|
1979 | 11 |
0.7%
|
|
1980 | 19 |
1.1%
|
|
1981 | 4 |
0.2%
|
|
1982 | 15 |
0.9%
|
|
1983 | 16 |
1%
|
|
1984 | 14 |
0.8%
|
|
1985 | 15 |
0.9%
|
|
1986 | 10 |
0.6%
|
|
1987 | 14 |
0.8%
|
|
1988 | 13 |
0.8%
|
|
1989 | 17 |
1%
|
|
1990 | 37 |
2.2%
|
|
1991 | 18 |
1.1%
|
|
1992 | 29 |
1.7%
|
|
1993 | 45 |
2.7%
|
|
1994 | 39 |
2.3%
|
|
1995 | 56 |
3.4%
|
|
1996 | 44 |
2.6%
|
|
1997 | 37 |
2.2%
|
|
1998 | 43 |
2.6%
|
|
1999 | 39 |
2.3%
|
|
2000 | 78 |
4.7%
|
|
2001 | 33 |
2%
|
|
2002 | 43 |
2.6%
|
|
2003 | 43 |
2.6%
|
|
2004 | 37 |
2.2%
|
|
2005 | 64 |
3.8%
|
|
2006 | 51 |
3.1%
|
|
2007 | 52 |
3.1%
|
|
2008 | 66 |
4%
|
|
2009 | 47 |
2.8%
|
|
2010 | 70 |
4.2%
|
|
2011 | 66 |
4%
|
|
2012 | 50 |
3%
|
|
2013 | 64 |
3.8%
|
|
2014 | 52 |
3.1%
|
|
2015 | 54 |
3.2%
|
|
2016 | 50 |
3%
|
|
2017 | 29 |
1.7%
|