Year	Number
1914	-2
1915	0
1916	0
1917	0
1918	0
1919	0
1920	0
1921	0
1922	0
1923	0
1924	0
1925	-9
1926	-9
1927	-9
1928	-9
1929	-9
1930	-9
1931	-9
1932	-9
1933	-9
1934	-9
1935	-9
1936	-9
1937	-9
1938	-9
1939	0
1940	0
1941	0
1942	0
1943	0
1944	0
1945	-5
1946	-9
1947	-9
1948	-9
1949	-9
1950	-9
1951	-9
1952	-9
1953	-9
1954	-9
1955	-9
1956	-9
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	-9
1975	-9
1976	-9
1977	-9
1978	-9
1979	-9
1980	-9
1981	-9
1982	-9
1983	-9
1984	-9
1985	-9
1986	-9
1987	-9
1988	-9
1989	-9
1990	1
1991	1
1992	5
1993	5
1994	5
1995	5
1996	0
1997	5
1998	5
1999	5
2000	5
2001	5
2002	7
2003	7
2004	7
2005	9
2006	9
2007	9
2008	9
2009	9
2010	9
2011	9