Year,Value,NumPoints 1851,-1.98566,850 1852,-2.52233,850 1853,-0.255683,850 1854,-0.636318,850 1855,-0.473219,850 1856,-1.9355,850 1857,-1.95427,850 1858,-2.64888,850 1859,-0.319803,850 1860,-1.27624,850 1861,0.128847,846 1862,-1.03016,850 1863,-1.38601,842 1864,-1.53668,843 1865,0.643519,842 1866,0.293511,842 1867,0.649095,843 1868,-1.37253,848 1869,-1.14475,846 1870,0.662731,850 1871,-2.53098,849 1872,-3.69014,850 1873,-0.9821,850 1874,-1.06116,850 1875,-1.64389,850 1876,-1.54636,850 1877,-1.17537,850 1878,0.492136,850 1879,-0.528319,850 1880,-5.10698,850 1881,-1.74438,850 1882,-1.25602,850 1883,-0.315087,850 1884,-0.476357,850 1885,0.413915,850 1886,-2.08934,850 1887,-0.582681,850 1888,-0.643594,850 1889,-1.4816,850 1890,0.600328,850 1891,-0.955352,850 1892,-0.877384,850 1893,-1.3759,850 1894,-0.0959043,850 1895,-1.35323,850 1896,-1.74379,850 1897,-0.507459,850 1898,-1.83258,850 1899,1.68025,850 1900,-0.100102,850 1901,-0.068617,850 1902,0.973508,850 1903,-0.821887,850 1904,0.754952,850 1905,0.258032,850 1906,-0.651725,850 1907,-0.473116,850 1908,0.427761,850 1909,1.74852,850 1910,-0.303388,850 1911,-2.30626,850 1912,0.287881,850 1913,1.81443,850 1914,0.947201,850 1915,0.779614,850 1916,-0.804471,850 1917,0.945362,850 1918,-0.624703,850 1919,-1.29372,850 1920,-1.09447,850 1921,0.484308,850 1922,0.0860411,850 1923,0.478695,850 1924,0.381815,850 1925,-0.652248,850 1926,-0.633549,850 1927,1.42503,850 1928,-0.041199,850 1929,-1.75104,850 1930,-0.280054,850 1931,0.920043,850 1932,-0.49384,850 1933,0.424015,850 1934,1.74096,850 1935,-1.15817,850 1936,-0.973764,850 1937,-0.476662,850 1938,-0.915332,850 1939,0.392048,850 1940,-1.40058,850 1941,0.748282,850 1942,0.823103,850 1943,-0.372056,850 1944,-0.0205875,850 1945,0.227971,850 1946,0.138503,850 1947,-1.78711,850 1948,0.0781951,850 1949,2.04618,850 1950,-0.435834,850 1951,-1.7947,850 1952,-0.837453,850 1953,1.29894,850 1954,1.40725,850 1955,-1.72498,850 1956,-0.583276,850 1957,-0.613511,850 1958,0.820373,850 1959,-1.50012,850 1960,0.685833,850 1961,-0.515746,850 1962,0.893878,850 1963,1.35138,850 1964,0.419065,850 1965,1.63191,850 1966,0.849028,850 1967,-0.0268665,850 1968,-0.196402,850 1969,0.0270727,850 1970,-0.126773,850 1971,0.0309129,850 1972,-1.40194,850 1973,0.679274,850 1974,0.407275,850 1975,0.540417,850 1976,-1.69994,850 1977,0.658808,850 1978,-0.0973176,850 1979,-0.912473,850 1980,0.330072,850 1981,1.62242,850 1982,-0.299142,850 1983,0.722457,850 1984,-0.077616,850 1985,-1.17079,850 1986,-0.231455,850 1987,1.14386,850 1988,0.772719,850 1989,0.559277,850 1990,1.65571,850 1991,-1.30572,850 1992,-0.965146,850 1993,-1.40866,850 1994,0.4418,850 1995,0.0656688,850 1996,-1.22503,850 1997,-0.500013,850 1998,1.63667,850 1999,3.31517,850 2000,-2.00927,850 2001,2.95158,850 2002,0.0990219,850 2003,0.293494,850 2004,1.16045,850 2005,1.6914,850 2006,1.16055,850 2007,1.13913,850 2008,1.07248,850 2009,2.11312,850 2010,0.244093,850 2011,0.984392,850 2012,1.14459,850 2013,-0.142942,850 2014,-1.3731,850 2015,1.47411,850 2016,3.23583,850 2017,1.69345,850 2018,-0.987358,850