Year,Value,NumPoints 1881,-0.540844,863 1882,-1.97915,908 1883,-0.731678,1024 1884,-1.70336,1099 1885,-2.55254,1122 1886,-4.70262,1122 1887,-2.76362,1122 1888,-0.36538,1099 1889,-1.30217,1122 1890,-2.81115,1136 1891,-0.582629,1009 1892,-3.28806,1085 1893,-2.62372,1161 1894,-3.19572,1290 1895,-1.1417,1366 1896,-2.81315,1342 1897,-1.44904,1402 1898,-1.65082,1298 1899,-2.10211,1411 1900,-2.7503,1379 1901,-2.59018,1325 1902,-3.11462,1455 1903,-1.80882,1468 1904,-1.40241,1447 1905,-0.817924,1360 1906,-4.12568,1252 1907,-2.45089,1390 1908,-2.24769,1449 1909,-3.75423,1404 1910,-1.83596,1480 1911,-2.95493,1509 1912,0.258079,1476 1913,-2.86243,1480 1914,-1.8191,1457 1915,-2.36134,1476 1916,-0.370849,1540 1917,-0.540698,1545 1918,-3.88593,1464 1919,-1.8957,1446 1920,-0.803222,1392 1921,-0.477653,1491 1922,0.750796,1535 1923,-1.2985,1555 1924,-0.625178,1547 1925,-0.00282646,1555 1926,2.20046,1565 1927,-1.03799,1582 1928,1.29017,1582 1929,1.40708,1602 1930,3.44733,1578 1931,-1.05764,2340 1932,-0.0665368,2340 1933,1.40572,2340 1934,1.09215,2340 1935,-1.04647,1602 1936,-1.16789,1602 1937,4.57644,2340 1938,2.49875,2340 1939,-0.386238,2340 1940,2.65333,2340 1941,-1.02352,2340 1942,3.76662,2340 1943,0.386475,2340 1944,2.18543,1620 1945,1.96011,1620 1946,0.38669,2340 1947,1.79802,2340 1948,0.247402,2340 1949,-0.0755778,2340 1950,0.741054,2340 1951,-1.86086,2340 1952,-0.769204,2340 1953,-0.0755785,2340 1954,0.281176,2340 1955,2.33601,2340 1956,0.382603,2340 1957,1.37866,2340 1958,1.52443,2340 1959,0.437539,2340 1960,0.620503,2340 1961,-0.0488324,2340 1962,0.985218,2340 1963,0.935271,2340 1964,-1.59971,2340 1965,-0.45446,2340 1966,-3.20691,2340 1967,-1.29637,2340 1968,-0.424049,2340 1969,0.115315,2340 1970,-0.22017,2340 1971,-1.58788,2340 1972,-0.496023,2340 1973,0.427341,2340 1974,0.129341,2340 1975,-1.18141,2340 1976,0.0891539,2340 1977,3.13662,2340 1978,0.207219,2340 1979,-0.265956,2340 1980,0.504024,2340 1981,3.8227,2340 1982,-1.67172,2340 1983,0.483328,2340 1984,1.66854,2340 1985,1.35073,2340 1986,-0.575702,2340 1987,0.0502229,2340 1988,0.554866,2340 1989,-1.85351,2340 1990,-0.383163,2340 1991,0.542309,2340 1992,0.576018,2340 1993,0.582306,2340 1994,-0.580292,2340 1995,1.20059,2340 1996,1.07657,2340 1997,-0.325975,2340 1998,0.159519,2340 1999,-0.683097,2340 2000,0.325889,2340 2001,1.46498,2340 2002,0.723354,2340 2003,1.99968,2340 2004,0.382246,2340 2005,2.6168,2340 2006,1.39959,2340 2007,3.29088,2340 2008,1.93863,2340 2009,2.88338,2340 2010,1.73965,2340 2011,3.39184,2340 2012,2.41699,2340 2013,1.94936,2340 2014,2.00738,2340 2015,1.87054,2340 2016,5.0515,2340 2017,3.64313,2340 2018,3.40009,2340 2019,1.41323,2340 2020,1.94497,2340