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Year | Available |
1931 | 0 |
1932 | 6 |
1933 | 1 |
1934 | 1 |
1935 | 0 |
1936 | 0 |
1937 | 0 |
1938 | 3 |
1939 | 3 |
1940 | 5 |
1941 | 3 |
1942 | 3 |
1943 | 2 |
1944 | 7 |
1945 | 5 |
1946 | 2 |
1947 | 2 |
1948 | 4 |
1949 | 1 |
1950 | 0 |
1951 | 0 |
1952 | 1 |
1953 | 2 |
1954 | 1 |
1955 | 0 |
1956 | 1 |
1957 | 1 |
1958 | 4 |
1959 | 2 |
1960 | 0 |
1961 | 4 |
1962 | 0 |
1963 | 0 |
1964 | 0 |
1965 | 0 |
1966 | 0 |
1967 | 0 |
1968 | 0 |
1969 | 17 |
1970 | 24 |
1971 | 1 |
1972 | 2 |
1973 | 3 |
1974 | 22 |
1975 | 9 |
1976 | 4 |
1977 | 1 |
1978 | 3 |
1979 | 0 |
1980 | 0 |
1981 | 31 |
1982 | 2 |
1983 | 0 |
1984 | 15 |
1985 | 0 |
1986 | 13 |
1987 | 1 |
1988 | 8 |
1989 | 5 |
1990 | 6 |
1991 | 12 |
1992 | 3 |
1993 | 7 |
1994 | 21 |
1995 | 2 |
1996 | 0 |
1997 | 52 |
1998 | 9 |
1999 | 3 |
2000 | 24 |
2001 | 1 |
2002 | 27 |
2003 | 1 |
2004 | 7 |
2005 | 4 |
2006 | 0 |
2007 | 0 |
2008 | 8 |
2009 | 0 |
2010 | 21 |
2011 | 1 |
2012 | 50 |
2013 | 0 |
2014 | 4 |
2015 | 13 |
2016 | 6 |
2017 | 0 |
2018 | 0 |
2019 | 0 |
2020 | 0 |