Year,Value,NumPoints 1851,-0.600385,78 1852,-0.879549,80 1853,-0.889085,82 1854,-0.792236,82 1855,-0.912252,86 1856,-1.89872,88 1857,-1.04444,91 1858,-2.17601,95 1859,-0.217229,96 1860,-1.55954,93 1861,-0.608978,92 1862,-1.21928,93 1863,-0.149886,91 1864,-1.70159,95 1865,0.0941095,99 1866,-0.657207,102 1867,-0.72907,107 1868,-1.33822,112 1869,-0.777229,114 1870,0.0475518,121 1871,-1.42029,125 1872,-0.634115,132 1873,-0.942806,140 1874,-0.755135,151 1875,-1.40962,166 1876,-1.43922,171 1877,0.151456,170 1878,-0.12025,179 1879,-1.07694,183 1880,-1.33292,193 1881,-0.711454,205 1882,-0.949958,212 1883,-0.655598,219 1884,-1.25812,223 1885,-0.664589,235 1886,-0.599861,241 1887,-0.607158,251 1888,-0.579391,257 1889,-0.840366,269 1890,-0.808673,279 1891,-1.08194,284 1892,-0.948726,285 1893,-0.539586,295 1894,-0.519035,296 1895,-0.403852,305 1896,-1.08665,306 1897,-0.616101,319 1898,-0.402598,333 1899,0.452367,334 1900,-0.270021,337 1901,-0.42414,349 1902,-0.750098,362 1903,-0.673055,365 1904,-0.267225,369 1905,0.0837219,377 1906,-0.508616,390 1907,-0.794796,392 1908,-0.79616,396 1909,0.0933723,407 1910,-0.786736,414 1911,-0.156931,430 1912,-0.625452,434 1913,0.206,439 1914,-0.3868,439 1915,0.000541147,436 1916,-0.424223,440 1917,-0.292511,448 1918,-0.288374,441 1919,-0.848693,426 1920,-0.578244,431 1921,-0.626904,453 1922,-0.166154,460 1923,0.224125,483 1924,-0.0941249,489 1925,-0.0518389,496 1926,0.103507,499 1927,-0.0424451,506 1928,0.0846922,508 1929,0.0209244,523 1930,0.152481,520 1931,-0.0692582,541 1932,-0.32152,550 1933,-0.355072,573 1934,0.247657,572 1935,-0.610696,581 1936,0.0989419,606 1937,0.0999978,613 1938,0.36237,625 1939,0.0127628,627 1940,-0.0372197,632 1941,-0.212172,654 1942,0.0861358,664 1943,-0.010221,663 1944,-0.0857223,664 1945,-0.139339,677 1946,-0.0117226,690 1947,0.0957087,704 1948,0.0125857,720 1949,-0.0284222,734 1950,-0.714019,750 1951,-0.0452982,816 1952,-0.551311,825 1953,-0.140358,824 1954,0.256508,834 1955,-0.416467,846 1956,-0.511438,861 1957,0.131273,881 1958,0.0573545,884 1959,-0.173506,889 1960,-0.221793,894 1961,0.00163867,914 1962,0.0751256,919 1963,0.280772,916 1964,-0.299852,922 1965,-0.222714,924 1966,-0.148811,929 1967,0.0224702,927 1968,-0.255346,928 1969,0.181781,933 1970,-0.0889768,930 1971,-0.0311816,928 1972,-0.253112,920 1973,-0.137284,919 1974,-0.342267,915 1975,-0.310057,914 1976,-0.446181,913 1977,0.402498,912 1978,0.138132,916 1979,0.117653,903 1980,0.246319,915 1981,0.153982,901 1982,-0.140563,895 1983,0.559665,896 1984,-0.167462,899 1985,-0.04137,902 1986,-0.0485774,899 1987,0.13323,893 1988,0.0878793,891 1989,0.0670365,888 1990,0.594666,877 1991,0.250874,854 1992,-0.223767,851 1993,-0.323346,842 1994,0.534424,856 1995,0.555677,862 1996,0.218601,843 1997,0.536539,837 1998,0.330553,850 1999,0.413628,842 2000,0.0627259,844 2001,1.03316,813 2002,0.729636,829 2003,0.681226,824 2004,1.06201,811 2005,1.18118,820 2006,0.906084,819 2007,0.775502,814 2008,1.03055,825 2009,0.827742,800 2010,1.2408,813 2011,0.672386,794 2012,0.935457,797 2013,1.13147,796 2014,0.719503,787 2015,1.33929,777 2016,0.811961,763 2017,0.953085,749 2018,0.739153,714 2019,1.01086,705 2020,1.54526,687 2021,1.04705,695