Year,Value,NumPoints 1851,-0.0841643,260 1852,-0.556549,270 1853,-0.6324,231 1854,-0.115759,253 1855,-0.768916,84 1856,-0.735544,242 1857,-0.383016,238 1858,-0.644165,242 1859,-0.661838,245 1860,-0.359337,250 1861,-0.564637,238 1862,-0.743862,240 1863,-0.468789,239 1864,-0.293283,237 1865,-0.379842,242 1866,-0.233129,238 1867,-0.179271,235 1868,0.245806,237 1869,0.593123,277 1870,0.138055,265 1871,-0.790184,246 1872,-0.0909308,258 1873,0.24032,277 1874,0.680561,277 1875,-0.291903,278 1876,-0.476587,272 1877,-0.199518,275 1878,0.201992,279 1879,-0.731727,209 1880,-0.340846,58 1881,-0.0344672,279 1882,-1.00847,279 1883,-0.818389,279 1884,-0.746816,279 1885,-0.463487,279 1886,0.0323327,279 1887,-1.5229,279 1888,-0.323179,278 1889,-0.13411,278 1890,-0.772149,279 1891,-0.238281,273 1892,-0.231438,277 1893,-0.938889,278 1894,-1.15189,278 1895,-0.702881,278 1896,-0.855575,279 1897,-0.0202071,278 1898,-0.63475,279 1899,-0.168264,279 1900,-0.0750728,279 1901,-0.250673,279 1902,-0.155061,279 1903,-0.197225,279 1904,-0.741311,279 1905,0.0145016,279 1906,-0.292192,279 1907,-0.529015,279 1908,-0.269833,279 1909,-0.934383,279 1910,-0.447972,279 1911,0.873485,279 1912,-0.144271,279 1913,-0.0489809,279 1914,1.45706,279 1915,0.0687352,279 1916,-0.284358,279 1917,-2.1519,279 1918,-0.677704,279 1919,-0.0735773,279 1920,-0.460761,279 1921,0.684547,279 1922,-0.297228,279 1923,1.10263,279 1924,-0.300475,279 1925,1.17795,279 1926,1.72996,279 1927,-0.708543,279 1928,0.584434,279 1929,0.988002,279 1930,0.110179,279 1931,0.0487829,279 1932,-0.679191,279 1933,-1.49538,279 1934,0.830235,279 1935,-0.52899,279 1936,0.821371,279 1937,1.22702,279 1938,1.43226,279 1939,-0.459504,279 1940,1.41966,279 1941,0.386655,279 1942,-0.44418,279 1943,1.38389,279 1944,0.836343,279 1945,-0.833754,279 1946,-0.560206,279 1947,0.8422,279 1948,-1.61054,279 1949,0.509391,279 1950,0.558748,279 1951,0.68985,279 1952,1.05508,279 1953,0.555078,279 1954,0.112109,279 1955,-1.57393,279 1956,-2.07837,279 1957,1.00625,279 1958,0.244279,279 1959,-0.368389,279 1960,0.324082,279 1961,-1.2926,279 1962,0.656413,279 1963,-0.0578433,279 1964,-0.571914,279 1965,-0.596964,279 1966,-0.160937,279 1967,0.675766,279 1968,-0.172359,279 1969,0.955603,279 1970,-0.85028,279 1971,-0.395449,279 1972,0.660489,279 1973,-0.280123,279 1974,-0.590759,279 1975,-1.43064,279 1976,0.974331,279 1977,0.223621,279 1978,1.18616,279 1979,1.52279,279 1980,-0.421341,279 1981,0.217413,279 1982,0.0586203,279 1983,0.37672,279 1984,0.121725,279 1985,0.265803,279 1986,0.960807,279 1987,0.770629,279 1988,-0.0278654,279 1989,0.833158,279 1990,-0.0531556,279 1991,0.308584,279 1992,-0.546879,279 1993,1.8159,279 1994,-0.275106,279 1995,0.671531,279 1996,-0.898037,279 1997,1.30644,279 1998,0.884759,279 1999,-0.464983,279 2000,1.10696,279 2001,-0.165372,279 2002,2.54173,279 2003,1.1322,279 2004,2.14126,279 2005,1.23165,279 2006,0.900379,279 2007,1.99753,279 2008,-0.368078,279 2009,1.09563,279 2010,0.827585,279 2011,0.317953,279 2012,-0.40039,279 2013,1.86683,279 2014,1.90487,279 2015,1.47824,279 2016,1.79231,279 2017,2.67774,279 2018,2.25811,279 2019,2.52093,279