Year,Value,NumPoints 1900,1.31413,1775 1901,0.892617,1721 1902,-3.46375,1711 1903,0.706975,1737 1904,1.06828,1740 1905,1.89089,1720 1906,0.604654,1628 1907,-0.294904,1750 1908,-1.1865,1809 1909,-1.04118,1768 1910,-1.07119,1832 1911,-1.02293,1777 1912,-1.39717,1830 1913,0.471865,1806 1914,-2.05887,1806 1915,-0.233392,1830 1916,-0.455481,1845 1917,-0.524365,1842 1918,-0.357686,1816 1919,-1.78168,1806 1920,1.14295,1806 1921,-0.2521,1823 1922,-0.204842,1840 1923,-0.678102,1840 1924,2.0871,1840 1925,-0.61554,1822 1926,3.12213,1848 1927,-1.46038,1911 1928,0.325186,1929 1929,-0.500215,1949 1930,0.598855,1925 1931,-0.718715,2680 1932,1.35978,2680 1933,-0.108488,2700 1934,0.462999,2700 1935,0.477916,1949 1936,-0.351041,1958 1937,0.179958,2700 1938,1.87287,2700 1939,0.102393,2700 1940,0.471072,2700 1941,-0.48351,2700 1942,-1.3686,2700 1943,1.48082,2700 1944,1.0984,1976 1945,0.265163,1980 1946,0.369165,2700 1947,1.29556,2700 1948,0.195176,2700 1949,2.30932,2700 1950,1.30674,2700 1951,-0.0955948,2700 1952,-0.476408,2700 1953,0.332383,2700 1954,0.305363,2700 1955,-1.11442,2700 1956,0.601164,2700 1957,0.260742,2700 1958,0.0155005,2700 1959,0.507391,2700 1960,-0.615593,2700 1961,-0.633001,2700 1962,1.61802,2700 1963,-1.7718,2700 1964,-2.17024,2700 1965,1.22092,2700 1966,-1.99444,2700 1967,1.44438,2700 1968,1.63474,2700 1969,-1.76022,2700 1970,1.2705,2700 1971,-0.159168,2700 1972,0.215153,2700 1973,0.0103831,2700 1974,0.718441,2700 1975,0.544386,2700 1976,0.415299,2700 1977,-1.09554,2700 1978,0.346961,2700 1979,-0.450551,2700 1980,0.874667,2700 1981,0.988157,2700 1982,0.0112403,2700 1983,1.10143,2700 1984,0.574723,2700 1985,0.396324,2700 1986,0.368828,2700 1987,-0.204083,2700 1988,1.18384,2700 1989,1.2185,2700 1990,3.44678,2700 1991,0.824236,2700 1992,1.75071,2700 1993,1.04299,2700 1994,0.592975,2700 1995,0.881998,2700 1996,2.25322,2700 1997,1.97572,2700 1998,1.83016,2700 1999,0.41874,2700 2000,2.24201,2700 2001,0.572993,2700 2002,2.43831,2700 2003,1.83428,2700 2004,0.141094,2700 2005,2.33851,2700 2006,1.62946,2700 2007,1.87316,2700 2008,1.45514,2700 2009,0.427077,2700 2010,2.23212,2700 2011,3.82804,2700 2012,0.917204,2700 2013,1.09857,2700 2014,3.72266,2700 2015,3.21155,2700 2016,4.12455,2700 2017,4.04365,2700 2018,1.49712,2700 2019,4.62824,2700 2020,2.95353,2700 2021,1.41987,2700 2022,3.86251,2700 2023,2.75087,2700