Year,Value,NumPoints 1900,0.0305113,421 1901,-0.610541,417 1902,-0.238894,417 1903,-0.992584,418 1904,-0.72435,414 1905,0.374788,415 1906,-0.913596,409 1907,-2.27669,414 1908,-0.0531462,419 1909,-1.19164,412 1910,-1.45893,420 1911,-1.12306,413 1912,0.47466,414 1913,-0.75337,413 1914,-1.65827,414 1915,0.253946,415 1916,0.0960086,416 1917,-0.605819,415 1918,-2.53368,414 1919,-1.14643,413 1920,-0.748886,413 1921,-0.915992,414 1922,-1.08289,423 1923,-0.228209,425 1924,0.178498,426 1925,-0.88128,425 1926,1.1419,425 1927,0.0457663,424 1928,0.770623,425 1929,1.03807,426 1930,0.399998,425 1931,0.985383,441 1932,0.352937,442 1933,-0.224615,443 1934,-0.547965,441 1935,0.166149,427 1936,0.161195,436 1937,0.461065,443 1938,0.396377,443 1939,0.545836,443 1940,2.00867,443 1941,1.1377,443 1942,1.06216,443 1943,-0.101314,441 1944,0.889467,429 1945,0.52311,429 1946,0.248244,443 1947,0.494048,443 1948,0.250595,443 1949,-0.74786,443 1950,-0.317658,443 1951,-0.00184187,443 1952,-0.22519,443 1953,1.01514,443 1954,-0.0108322,443 1955,-0.265666,443 1956,-0.525161,444 1957,0.298579,445 1958,0.598319,445 1959,-0.338892,445 1960,0.727833,445 1961,-0.203564,445 1962,0.164799,445 1963,0.490798,445 1964,-0.281639,445 1965,-0.16516,445 1966,-0.346476,445 1967,-0.256818,445 1968,0.151557,445 1969,-0.0345851,445 1970,0.347278,445 1971,-0.406475,445 1972,-1.63427,445 1973,-0.209283,445 1974,-0.436454,445 1975,-0.30918,445 1976,-0.165894,445 1977,1.34102,445 1978,0.0699837,445 1979,0.0970554,445 1980,0.973911,445 1981,1.09909,445 1982,-0.3019,445 1983,-0.547537,445 1984,0.030514,445 1985,0.388389,445 1986,0.732321,445 1987,0.636485,445 1988,1.29857,445 1989,0.00483716,445 1990,0.418897,445 1991,0.464404,445 1992,-0.311553,445 1993,0.535543,445 1994,0.453282,445 1995,0.875562,445 1996,0.486828,445 1997,0.768566,445 1998,1.77694,445 1999,0.891084,445 2000,0.988058,445 2001,1.52106,445 2002,0.747408,445 2003,1.90915,445 2004,0.732369,445 2005,1.50325,445 2006,2.1934,445 2007,1.49582,445 2008,0.832297,445 2009,0.883578,445 2010,3.03137,445 2011,1.55338,445 2012,1.77262,445 2013,1.20007,445 2014,1.39078,445 2015,1.24561,445 2016,2.73224,445 2017,1.55199,445 2018,1.37683,445 2019,2.4285,445 2020,1.05276,445 2021,1.89175,445