1933	1
1934	1
1935	1
1936	-1
1937	1
1938	-1
1939	1
1940	-1
1941	1
1942	1
1943	1
1944	-1
1945    NA
1946	1
1947	1
1948	1
1949	1
1950	-1
1951	-1
1952	-1
1953	-1
1954	1
1955	-1
1956	-1
1957	1
1958	1
1959	-1
1959	1
1960	-1
1960	-1
1961	-1
1961	0
1962	-1
1962	1
1963	-1
1964	-1
1965	-1
1966	-1
1967	-1
1968	-1
1969	-1
1970	-1
1971	1
1972	-1
1973	-1
1974	-1
1975	-1
1976	-1
1977	-1
1978	-1
1979	-1
1980	-1
1981	-1
1982	-1
1983	1
1984	-1
1985	-1
1986	1
1987	-1
1988	1
1989	1
1990	1
1991	1
1992	1
1993	1
1994	-1
1995	-1
1996	-1
1997	1
1998	1
1999	1
2000	1
2001	1
2002	0
2003	1
2004	1
2005	1
2006	1
2007	1
2008	1
2009	1
2010	-1
2011	-1
2012	-1
2013	1
2014	1
2015	1
2016	1
2017	1
2018    1
2019    1