Year	Number
1946	-10
1947	-10
1948	-10
1949	-10
1950	-10
1951	-4
1952	-1
1953	-1
1954	-1
1955	-1
1956	-1
1957	-9
1958	-9
1959	-9
1960	-9
1961	-9
1962	-9
1963	-9
1964	-9
1965	-9
1966	-9
1967	-9
1968	-9
1969	-9
1970	-9
1971	-9
1972	-9
1973	-9
1974	-10
1975	-10
1976	-10
1977	-10
1978	-10
1979	-10
1980	-10
1981	-10
1982	-10
1983	-10
1984	-9
1985	-9
1986	-9
1987	-9
1988	-9
1989	-4
1990	-4
1991	-4
1992	-2
1993	-2
1994	-2
1995	-2
1996	-2
1997	-2
1998	-2
1999	-2
2000	-2
2001	-2
2002	-2
2003	-2
2004	-2
2005	-2
2006	-2
2007	-3
2008	-3
2009	-3
2010	-3
2011	-3