Year,Value,NumPoints 1851,-0.438975,44608 1852,-0.626198,42369 1853,-0.248253,46662 1854,-0.203703,47030 1855,-0.199694,46563 1856,-0.340968,49279 1857,-0.580744,49564 1858,-0.28053,49405 1859,-0.198324,50059 1860,-0.550502,47902 1861,-0.508378,43009 1862,-0.50811,41981 1863,-0.284509,43885 1864,-0.341232,38091 1865,-0.434465,36608 1866,-0.417783,34597 1867,-0.280612,37959 1868,-0.253394,38621 1869,-0.370882,46903 1870,-0.259188,50188 1871,-0.199626,48067 1872,-0.332992,48667 1873,-0.223591,51668 1874,-0.569888,50213 1875,-0.381876,52135 1876,-0.251225,50179 1877,0.0955797,52548 1878,0.566474,52224 1879,-0.0311389,53818 1880,-0.205653,51144 1881,-0.0339291,52546 1882,-0.0643531,54370 1883,-0.052025,55868 1884,-0.43655,55646 1885,-0.324743,55800 1886,-0.478329,56059 1887,-0.437196,55956 1888,-0.397031,56194 1889,0.0827705,55138 1890,-0.503923,54609 1891,-0.172376,54542 1892,-0.377494,55277 1893,-0.254059,55407 1894,-0.294627,55225 1895,-0.381003,52850 1896,-0.404458,53594 1897,-0.244133,53482 1898,-0.559421,55803 1899,-0.386037,56219 1900,0.0501037,56076 1901,0.00612968,56377 1902,-0.351006,56383 1903,-0.253114,57092 1904,-0.451515,57536 1905,-0.269642,56824 1906,-0.0803786,56879 1907,-0.230653,56925 1908,-0.549,57221 1909,-0.538821,56910 1910,-0.504002,56908 1911,-0.563884,57214 1912,-0.37979,57226 1913,-0.402214,57235 1914,-0.298744,57103 1915,0.0161764,56351 1916,-0.229877,56317 1917,-0.652731,55832 1918,-0.382986,54574 1919,-0.242065,51214 1920,-0.0555438,56278 1921,-0.259673,55227 1922,-0.0962644,57043 1923,-0.33207,56519 1924,-0.0186618,56452 1925,-0.220084,56571 1926,0.150897,56947 1927,-0.341583,56941 1928,-0.181348,56600 1929,-0.361937,56753 1930,-0.0909913,56538 1931,-0.0519473,57018 1932,-0.0638128,57037 1933,-0.278206,57545 1934,-0.332961,57767 1935,-0.143114,57375 1936,-0.281515,57732 1937,-0.11953,57402 1938,0.106273,57730 1939,-0.167589,57701 1940,0.112087,57038 1941,-0.0295718,53801 1942,0.116679,54231 1943,-0.0105717,54816 1944,0.282961,52709 1945,0.109422,52155 1946,0.0623331,56048 1947,0.139782,58716 1948,-0.188425,58813 1949,-0.0398117,58883 1950,-0.0969444,59624 1951,-0.125158,59684 1952,-0.0379223,58496 1953,0.120187,58574 1954,-0.0645692,58497 1955,-0.240605,63636 1956,-0.204657,64800 1957,-0.0711746,64800 1958,0.135269,64800 1959,0.154584,64800 1960,-0.315384,64800 1961,0.0629155,64800 1962,0.149199,64800 1963,-0.203675,64800 1964,-0.277519,64800 1965,-0.161289,64800 1966,-0.0368367,64800 1967,0.0595339,64800 1968,0.138751,64800 1969,-0.0117591,64800 1970,0.0415178,64800 1971,-0.212464,64800 1972,0.0142301,64800 1973,0.210039,64800 1974,-0.101602,64800 1975,0.167753,64800 1976,-0.211727,64800 1977,0.215391,64800 1978,0.217096,64800 1979,0.213678,64800 1980,0.399068,64800 1981,0.480828,64800 1982,0.00842395,64800 1983,0.395702,64800 1984,0.315487,64800 1985,0.201063,64800 1986,0.284986,64800 1987,0.244474,64800 1988,0.490064,64800 1989,0.333594,64800 1990,0.761876,64800 1991,0.401904,64800 1992,0.489404,64800 1993,0.408186,64800 1994,0.390313,64800 1995,0.505043,64800 1996,0.472743,64800 1997,0.579518,64800 1998,0.705256,64800 1999,0.407386,64800 2000,0.592715,64800 2001,0.633669,64800 2002,0.963493,64800 2003,0.619291,64800 2004,0.662375,64800 2005,0.810615,64800 2006,0.732264,64800 2007,0.726332,64800 2008,0.715168,64800 2009,0.548095,64800 2010,0.958,64800 2011,0.727102,64800 2012,0.548424,64800 2013,0.709863,64800 2014,0.806249,64800 2015,0.934004,64800 2016,1.34874,64800 2017,1.24326,64800 2018,0.952478,64800 2019,1.23716,64800 2020,1.19599,64800 2021,0.898821,64800