Year,Value,NumPoints 1851,0.0860345,271 1852,0.0620168,270 1853,0.0663482,273 1854,-0.472903,259 1855,0.200328,11 1856,0.461242,239 1857,-0.549429,244 1858,-0.187202,240 1859,-0.118175,239 1860,0.00622296,243 1861,-0.147845,240 1862,-1.14468,249 1863,-0.0735051,244 1864,0.025446,240 1865,-0.0696038,243 1866,0.0129609,249 1867,-0.234835,241 1868,0.418162,240 1869,0.615623,276 1870,0.329617,278 1871,-0.868901,277 1872,0.276412,239 1873,-1.13047,277 1874,1.2791,277 1875,1.02847,278 1876,-0.861011,278 1877,-0.0672911,277 1878,-0.31721,279 1879,0.32552,278 1880,-0.324901,277 1881,-0.0103386,127 1882,-0.838774,279 1883,1.24124,279 1884,0.939293,279 1885,0.585792,279 1886,-1.97884,279 1887,-1.59153,279 1888,-0.128083,279 1889,1.49886,278 1890,-0.564304,279 1891,0.226907,273 1892,0.0279526,229 1893,1.10077,278 1894,-3.67461,279 1895,-1.37084,278 1896,-3.60091,278 1897,-0.314379,278 1898,0.650315,279 1899,-0.408301,279 1900,0.136324,279 1901,-1.62816,279 1902,-0.235925,279 1903,-1.18053,279 1904,-0.616724,279 1905,2.61609,279 1906,-0.335958,279 1907,-0.768536,279 1908,0.416576,279 1909,-2.29403,279 1910,-2.03842,279 1911,-1.19529,279 1912,3.51829,279 1913,0.33299,279 1914,0.743322,279 1915,2.30851,279 1916,-0.209113,279 1917,0.476496,279 1918,-1.62381,279 1919,0.106155,279 1920,-1.00745,279 1921,-0.758795,279 1922,0.274986,279 1923,0.632286,279 1924,-0.482536,279 1925,-1.52507,279 1926,3.40282,279 1927,-0.497305,279 1928,1.52187,279 1929,1.71142,279 1930,-0.400557,279 1931,1.16846,279 1932,-0.61105,279 1933,-0.800511,279 1934,0.209635,279 1935,0.928822,279 1936,0.205376,279 1937,0.560013,279 1938,0.153641,279 1939,-0.154218,279 1940,3.31576,279 1941,1.92614,279 1942,3.56545,279 1943,0.513382,279 1944,1.34465,279 1945,1.17265,279 1946,-0.0562871,279 1947,-0.0586167,279 1948,0.00443053,279 1949,-0.28872,279 1950,0.414984,279 1951,-1.12113,279 1952,-1.29015,279 1953,0.186492,279 1954,-0.761446,279 1955,-0.565604,279 1956,-1.44966,279 1957,2.12672,279 1958,1.85013,279 1959,-0.553895,279 1960,0.968509,279 1961,-0.188882,279 1962,1.27672,279 1963,1.83484,279 1964,-2.10584,279 1965,-0.069118,279 1966,-1.74101,279 1967,1.21426,279 1968,0.468526,279 1969,0.650857,279 1970,1.22607,279 1971,-3.4789,279 1972,-3.02402,279 1973,-0.379929,279 1974,-1.41544,279 1975,-0.777808,279 1976,-0.841882,279 1977,1.8767,279 1978,3.03085,279 1979,1.01874,279 1980,2.0353,279 1981,4.82773,279 1982,-0.223184,279 1983,1.15785,279 1984,-0.495092,279 1985,0.595396,279 1986,0.293401,279 1987,1.72544,279 1988,2.39452,279 1989,0.814814,279 1990,0.240823,279 1991,1.57926,279 1992,0.327482,279 1993,3.05966,279 1994,1.22155,279 1995,2.08891,279 1996,1.16882,279 1997,1.85421,279 1998,2.99198,279 1999,-1.07618,279 2000,1.91867,279 2001,2.76327,279 2002,2.28965,279 2003,3.05824,279 2004,1.7402,279 2005,2.86047,279 2006,0.342788,279 2007,0.747501,279 2008,0.344424,279 2009,0.311543,279 2010,1.88125,279 2011,1.7344,279 2012,-0.630637,279 2013,0.498337,279 2014,3.67726,279 2015,3.84632,279 2016,5.86035,279 2017,1.6311,279 2018,3.30691,279 2019,5.05983,279 2020,0.484596,279