Year,Value,NumPoints 1900,-2.90519,6 1901,-0.804053,7 1902,-2.37475,8 1903,-0.810762,6 1904,-0.517497,4 1905,0.614543,6 1906,-1.35476,7 1907,-0.833643,6 1908,-0.643714,8 1909,-1.89351,6 1910,-0.661042,10 1911,1.06783,9 1912,0.763749,9 1913,-0.0356379,7 1914,3.06345,8 1915,-1.02356,8 1916,-0.485143,8 1917,-6.11339,9 1918,-1.44426,11 1919,-1.30766,11 1920,-0.643996,11 1921,0.984635,10 1922,0.753911,11 1923,1.09977,13 1924,-0.146579,13 1925,2.11927,12 1926,1.55928,15 1927,-2.31355,15 1928,2.07163,16 1929,1.37015,16 1930,0.416332,16 1931,0.952973,17 1932,-1.76459,17 1933,-3.24945,17 1934,2.12192,16 1935,-1.27471,17 1936,-0.510241,17 1937,2.45235,18 1938,2.96166,18 1939,-0.189222,18 1940,1.8508,19 1941,-0.278583,19 1942,-2.01512,19 1943,4.05722,20 1944,2.30607,21 1945,-1.34703,22 1946,-1.64725,22 1947,2.16828,23 1948,-2.14674,24 1949,1.67698,23 1950,0.282116,24 1951,0.492163,25 1952,3.82094,26 1953,0.731254,26 1954,0.387696,26 1955,-2.9304,26 1956,-3.2052,26 1957,-0.066744,28 1958,-0.150928,29 1959,-0.307812,29 1960,1.33284,29 1961,-2.8847,29 1962,1.67617,30 1963,0.355784,28 1964,-0.87712,29 1965,-0.45608,28 1966,-0.5828,29 1967,1.17051,29 1968,-0.753222,29 1969,1.94342,29 1970,-0.581849,29 1971,-0.507782,29 1972,0.785435,30 1973,0.0648792,30 1974,-1.94824,30 1975,-3.06555,30 1976,0.970025,30 1977,-0.981249,30 1978,1.1393,30 1979,2.26394,27 1980,-0.320781,29 1981,1.4708,28 1982,-0.703539,28 1983,1.16153,28 1984,-0.847615,29 1985,0.760812,29 1986,1.43298,28 1987,1.794,29 1988,-0.492462,29 1989,-0.0949204,28 1990,-1.77208,27 1991,0.190753,28 1992,-0.256835,28 1993,2.72633,25 1994,-0.849976,26 1995,0.20005,27 1996,-0.997795,26 1997,1.51195,27 1998,2.64532,28 1999,-0.485441,28 2000,2.18019,28 2001,0.203031,27 2002,5.41243,27 2003,2.39772,27 2004,1.67444,28 2005,2.10469,27 2006,2.20335,27 2007,2.6978,27 2008,0.654693,27 2009,2.09382,25 2010,2.13976,27 2011,1.44002,27 2012,-0.422431,27 2013,2.74827,26 2014,3.53813,26 2015,3.28807,26 2016,2.79566,24 2017,4.51654,25 2018,4.05431,22 2019,3.66913,21 2020,3.2278,22