Year,Value,NumPoints 1881,-0.229528,11302 1882,-0.211676,11480 1883,-0.289588,11553 1884,-0.383189,11335 1885,-0.279501,11578 1886,-0.295732,11674 1887,-0.285678,11639 1888,0.0116554,11651 1889,-0.363495,11706 1890,-0.475457,11559 1891,-0.339663,11765 1892,-0.466741,11841 1893,-0.204594,12026 1894,-0.282926,12104 1895,-0.173721,12084 1896,-0.0630633,12100 1897,-0.190069,12313 1898,-0.4069,12298 1899,0.135422,12229 1900,-0.0674591,12298 1901,-0.166727,12350 1902,-0.376186,12404 1903,-0.421528,12531 1904,-0.163865,12613 1905,-0.0578551,12496 1906,-0.372907,12612 1907,-0.451554,12679 1908,-0.528177,12641 1909,-0.310248,12688 1910,-0.571632,12713 1911,-0.225112,12639 1912,-0.394519,12703 1913,-0.198371,12732 1914,-0.158727,12774 1915,-0.119799,12773 1916,-0.463691,12781 1917,-0.339191,12690 1918,-0.115109,12731 1919,-0.424672,12741 1920,-0.279971,12719 1921,-0.134851,12808 1922,-0.138858,12798 1923,-0.00675739,12803 1924,-0.182225,12819 1925,0.067519,12861 1926,-0.0393231,12919 1927,-0.0424576,12919 1928,-0.0840495,12919 1929,-0.0985667,12920 1930,0.207076,13697 1931,-0.0222998,13698 1932,-0.268029,13700 1933,-0.30699,13700 1934,0.0570597,12949 1935,-0.25178,12977 1936,0.0334761,13706 1937,0.106922,13698 1938,0.0886754,13707 1939,0.0913222,13706 1940,0.192217,13705 1941,0.236037,13715 1942,0.0972196,13706 1943,0.210883,12994 1944,0.112512,13075 1945,0.0771409,13794 1946,-0.0494005,13852 1947,0.0451049,13852 1948,-0.113978,13872 1949,-0.0886034,13855 1950,-0.333024,13993 1951,0.00194711,14051 1952,-0.125262,13821 1953,-0.00410494,13821 1954,0.0970937,14069 1955,-0.258639,14328 1956,-0.152114,14848 1957,0.0765758,16044 1958,0.0260128,15987 1959,-0.0899872,16050 1960,-0.111901,16052 1961,0.035314,15964 1962,0.061131,15979 1963,0.138789,16054 1964,-0.20188,16054 1965,-0.0665762,16054 1966,-0.00992838,16056 1967,-0.0384943,16056 1968,-0.0436471,16056 1969,0.116931,16056 1970,0.0250497,15964 1971,-0.0919523,16044 1972,0.00289291,15898 1973,0.0480467,15898 1974,-0.0688721,15898 1975,-0.16656,15964 1976,-0.0651554,15968 1977,0.151239,15968 1978,0.121322,15968 1979,0.280739,15968 1980,0.301953,15968 1981,0.231721,15968 1982,0.168238,15960 1983,0.280957,16050 1984,0.0513135,15968 1985,0.0324689,15968 1986,0.0926227,16054 1987,0.295818,16056 1988,0.104576,15966 1989,0.174748,15968 1990,0.454881,15968 1991,0.293069,16009 1992,0.0235806,15885 1993,0.0257034,15900 1994,0.438366,15896 1995,0.42946,15898 1996,0.390061,15900 1997,0.635438,16007 1998,0.439212,16007 1999,0.359422,15894 2000,0.309868,15894 2001,0.715401,15900 2002,0.582421,15900 2003,0.535414,15900 2004,0.723528,15878 2005,0.727974,15893 2006,0.736002,16007 2007,0.599914,16007 2008,0.686338,16007 2009,0.786173,15900 2010,0.815175,16005 2011,0.593766,15900 2012,0.791534,16007 2013,0.835482,16007 2014,0.666764,16007 2015,1.06141,16007 2016,0.943707,16007 2017,0.886733,16007 2018,0.816199,16007 2019,1.0001,16007 2020,1.11657,16007 2021,0.931045,16007 2022,0.726302,16007