Year,Value,NumPoints 1900,-2.63813,420 1901,-2.79408,409 1902,-1.23147,411 1903,-2.10865,420 1904,-3.59242,407 1905,-1.93997,413 1906,-5.80893,407 1907,-3.44121,416 1908,-0.325356,422 1909,-7.25811,409 1910,-3.11659,422 1911,-4.92846,410 1912,0.636484,415 1913,-3.29658,415 1914,-2.78288,417 1915,0.0704288,415 1916,-1.12672,419 1917,0.806802,415 1918,-4.57036,415 1919,-0.971417,413 1920,-3.21811,413 1921,-2.4119,413 1922,1.21895,425 1923,-3.13526,427 1924,0.516183,426 1925,-5.07109,427 1926,3.62781,426 1927,1.19063,425 1928,2.80247,425 1929,4.61203,427 1930,0.58093,424 1931,3.07048,443 1932,-1.92155,443 1933,-2.33696,443 1934,-1.87526,443 1935,-2.24787,427 1936,-0.242567,427 1937,1.89927,443 1938,0.138251,443 1939,1.87185,443 1940,5.08202,443 1941,1.81181,443 1942,4.09674,443 1943,0.113978,443 1944,1.95869,429 1945,3.63453,429 1946,0.858052,443 1947,0.961231,443 1948,2.03226,443 1949,-0.336098,443 1950,-1.57303,443 1951,-1.70919,443 1952,-2.17181,443 1953,-1.38009,443 1954,-1.529,443 1955,1.48198,443 1956,-0.808558,443 1957,0.225434,445 1958,3.10562,445 1959,0.279671,445 1960,1.67875,445 1961,1.33533,445 1962,0.63347,445 1963,2.0313,445 1964,0.0662633,445 1965,-0.551686,445 1966,-3.51847,445 1967,0.366213,445 1968,-1.0394,445 1969,-1.0105,445 1970,-0.321964,445 1971,-2.60903,445 1972,-2.05392,445 1973,0.504888,445 1974,-1.15504,445 1975,-3.24878,445 1976,0.193373,445 1977,5.58546,445 1978,1.45917,445 1979,2.68618,445 1980,1.45877,445 1981,6.07806,445 1982,-1.45435,445 1983,-1.48305,445 1984,-0.616499,445 1985,5.59368,445 1986,2.07169,445 1987,3.19559,445 1988,0.318853,445 1989,-2.8815,445 1990,0.0932215,445 1991,-0.51646,445 1992,2.04914,445 1993,-0.160852,445 1994,-0.374448,445 1995,1.39359,445 1996,-1.10287,445 1997,0.341139,445 1998,-0.311472,445 1999,0.0815795,445 2000,1.01654,445 2001,4.09745,445 2002,3.04234,445 2003,4.30257,445 2004,-0.666618,445 2005,1.51538,445 2006,1.51315,445 2007,3.04305,445 2008,0.895284,445 2009,2.45979,445 2010,3.23605,445 2011,4.1481,445 2012,0.26,445 2013,2.91093,445 2014,5.24421,445 2015,1.94813,445 2016,6.15828,445 2017,3.2593,445 2018,2.80376,445 2019,1.48987,445 2020,-0.125134,445 2021,5.6085,445 2022,2.12817,445 2023,3.18376,445