Year,Value,NumPoints 1851,-0.0191608,267 1852,-0.212415,270 1853,-0.399101,273 1854,-0.509433,257 1855,-0.0978194,68 1856,-0.304583,244 1857,-0.706226,244 1858,-0.490318,244 1859,-0.542639,245 1860,-0.223896,250 1861,-0.274568,241 1862,-1.15427,247 1863,-0.327137,241 1864,-0.217549,238 1865,-0.409566,243 1866,-0.396449,244 1867,-0.430344,238 1868,0.174402,239 1869,0.354412,277 1870,0.123189,270 1871,-0.915162,265 1872,-0.125272,244 1873,-0.578928,278 1874,0.926233,277 1875,0.597168,279 1876,-0.701695,275 1877,-0.16793,277 1878,-0.133109,279 1879,-0.264341,232 1880,-0.345326,173 1881,0.147374,205 1882,-0.707795,279 1883,0.615659,279 1884,-0.180022,279 1885,0.464642,279 1886,-1.09422,279 1887,-1.35365,279 1888,-0.249816,279 1889,0.731704,279 1890,-0.592276,279 1891,0.0524989,274 1892,-0.168033,255 1893,0.196732,279 1894,-2.38143,279 1895,-1.15355,279 1896,-2.15111,278 1897,-0.737179,279 1898,0.080763,279 1899,-0.313675,279 1900,-0.0326405,279 1901,-1.05237,279 1902,0.320099,279 1903,-0.856908,279 1904,-0.624198,279 1905,0.963102,279 1906,-0.0698845,279 1907,-0.801033,279 1908,-0.440378,279 1909,-1.56762,279 1910,-1.28739,279 1911,-0.0383778,279 1912,1.54362,279 1913,-0.0659798,279 1914,0.52463,279 1915,1.3891,279 1916,0.0957769,279 1917,0.0217848,279 1918,-0.893212,279 1919,-0.0880414,279 1920,-0.838362,279 1921,-0.388396,279 1922,-0.243058,279 1923,1.09453,279 1924,-0.81878,279 1925,-0.198385,279 1926,2.56465,279 1927,-0.37821,279 1928,0.533445,279 1929,1.09703,279 1930,-0.297233,279 1931,0.260769,279 1932,-0.553123,279 1933,-1.0201,279 1934,0.162653,279 1935,0.327377,279 1936,0.614885,279 1937,0.701745,279 1938,0.518733,279 1939,-0.381954,279 1940,2.10006,279 1941,1.14837,279 1942,2.27508,279 1943,0.492635,279 1944,0.902275,279 1945,0.361395,279 1946,0.197638,279 1947,-0.162202,279 1948,-0.464824,279 1949,-0.111245,279 1950,0.531011,279 1951,-0.462983,279 1952,-0.651601,279 1953,0.295738,279 1954,-0.155777,279 1955,-0.767887,279 1956,-1.24778,279 1957,1.68679,279 1958,0.952819,279 1959,-0.462733,279 1960,0.22344,279 1961,-0.356273,279 1962,0.860825,279 1963,0.816956,279 1964,-0.871514,279 1965,-0.552078,279 1966,-0.899977,279 1967,0.681424,279 1968,0.336161,279 1969,0.542611,279 1970,-0.164234,279 1971,-1.99562,279 1972,-1.36809,279 1973,-0.443225,279 1974,-0.690396,279 1975,-0.615481,279 1976,-0.235337,279 1977,1.59705,279 1978,1.69559,279 1979,1.23415,279 1980,1.01744,279 1981,2.33662,279 1982,-0.356839,279 1983,0.22686,279 1984,-0.190261,279 1985,-0.126152,279 1986,0.185773,279 1987,1.19074,279 1988,1.07628,279 1989,0.890138,279 1990,0.42882,279 1991,1.04518,279 1992,-0.381034,279 1993,2.06759,279 1994,0.644459,279 1995,1.47271,279 1996,-0.0631054,279 1997,1.33575,279 1998,1.76251,279 1999,-0.456705,279 2000,0.753184,279 2001,1.39321,279 2002,1.63054,279 2003,1.98469,279 2004,1.79224,279 2005,2.07367,279 2006,0.668438,279 2007,0.987885,279 2008,-0.28751,279 2009,0.669183,279 2010,1.34898,279 2011,1.11906,279 2012,-0.237269,279 2013,1.10898,279 2014,2.07316,279 2015,2.34165,279 2016,3.74572,279 2017,1.51696,279 2018,2.43694,279 2019,3.6397,279