Year,Value,NumPoints 1851,0.300219,258 1852,0.507936,256 1853,0.0742128,247 1854,-0.199554,253 1855,0.562938,98 1856,0.0863312,165 1857,-0.485018,245 1858,0.141418,243 1859,-0.441823,246 1860,0.826032,242 1861,-0.345742,243 1862,-1.51135,247 1863,0.123957,243 1864,0.198488,241 1865,0.425724,242 1866,0.147707,250 1867,-0.132561,238 1868,0.215607,236 1869,0.814705,263 1870,0.847155,277 1871,-0.245786,277 1872,0.379487,243 1873,-0.346694,278 1874,1.06483,277 1875,2.40829,278 1876,-1.33728,277 1877,-0.532573,279 1878,-0.445905,279 1879,0.872988,279 1880,-0.570155,279 1881,-0.243974,50 1882,-1.1581,279 1883,-0.499996,279 1884,0.345856,279 1885,-1.01716,279 1886,-3.40165,279 1887,-0.725425,279 1888,-0.495004,279 1889,1.78514,278 1890,0.1788,279 1891,0.0381364,273 1892,0.602809,277 1893,1.29136,278 1894,-2.55806,279 1895,-0.821478,279 1896,-4.76348,278 1897,0.383156,278 1898,1.68007,279 1899,0.0326641,279 1900,-0.131943,279 1901,-0.481013,279 1902,1.23913,279 1903,-2.45053,279 1904,-0.384555,279 1905,2.47944,279 1906,-2.14059,279 1907,-1.99722,279 1908,1.77944,279 1909,-1.47683,279 1910,-1.6033,279 1911,-0.666453,279 1912,2.56912,279 1913,-0.298736,279 1914,1.42,279 1915,3.47725,279 1916,0.113069,279 1917,-1.50171,279 1918,-2.9211,279 1919,-0.35361,279 1920,1.10679,279 1921,-1.68616,279 1922,2.6462,279 1923,1.40894,279 1924,-1.13938,279 1925,-3.15142,279 1926,2.46552,279 1927,1.04817,279 1928,3.33186,279 1929,4.55652,279 1930,0.360519,279 1931,3.3623,279 1932,-2.5033,279 1933,-1.4168,279 1934,-1.90545,279 1935,2.74385,279 1936,-0.763982,279 1937,1.38838,279 1938,-0.796175,279 1939,0.909072,279 1940,3.31234,279 1941,2.4722,279 1942,5.13743,279 1943,-2.15039,279 1944,3.30567,279 1945,4.0706,279 1946,1.54476,279 1947,-2.59466,279 1948,1.97874,279 1949,-1.5645,279 1950,-0.924933,279 1951,-1.1447,279 1952,-0.72783,279 1953,-0.0101064,279 1954,-1.63045,279 1955,-1.34185,279 1956,-2.69498,279 1957,-0.101025,279 1958,0.17266,279 1959,1.92824,279 1960,1.42233,279 1961,3.09001,279 1962,0.856384,279 1963,3.25402,279 1964,1.48513,279 1965,-3.74988,279 1966,-0.735437,279 1967,0.0323918,279 1968,0.853003,279 1969,-1.70583,279 1970,2.69698,279 1971,-3.09977,279 1972,-1.43184,279 1973,0.0150584,279 1974,-1.48679,279 1975,-1.84059,279 1976,-2.25218,279 1977,5.27084,279 1978,3.08931,279 1979,1.33173,279 1980,0.661824,279 1981,2.89442,279 1982,0.614001,279 1983,1.60399,279 1984,-0.0830193,279 1985,3.23514,279 1986,4.64378,279 1987,4.37561,279 1988,2.69153,279 1989,1.48891,279 1990,-1.29635,279 1991,0.790879,279 1992,0.893759,279 1993,1.93391,279 1994,2.99386,279 1995,1.83412,279 1996,0.332712,279 1997,1.90115,279 1998,1.49443,279 1999,-1.30379,279 2000,1.36336,279 2001,6.72707,279 2002,2.02629,279 2003,5.82135,279 2004,1.44004,279 2005,2.9503,279 2006,2.74021,279 2007,2.50857,279 2008,0.776649,279 2009,1.0127,279 2010,3.07616,279 2011,1.18628,279 2012,0.48559,279 2013,1.50272,279 2014,4.53031,279 2015,5.12356,279 2016,6.38476,279 2017,2.54639,279 2018,6.0187,279 2019,4.75045,279 2020,-0.635751,279 2021,2.54248,279 2022,1.65526,279 2023,3.24467,279