Year,Value,NumPoints 1900,-2.8942,7 1901,-0.806514,8 1902,-2.24576,9 1903,-0.55626,7 1904,-0.732202,5 1905,0.471175,7 1906,-1.36581,8 1907,-0.757854,7 1908,-0.738912,9 1909,-1.97348,7 1910,-0.674334,11 1911,0.918836,11 1912,0.736259,11 1913,-0.412463,9 1914,2.26834,10 1915,-0.686828,10 1916,-0.738879,10 1917,-5.74496,11 1918,-1.42821,13 1919,-1.34472,13 1920,-0.734427,13 1921,0.704995,13 1922,0.222346,15 1923,1.1085,17 1924,-0.192791,17 1925,1.77261,16 1926,1.22518,18 1927,-2.00743,19 1928,2.29598,19 1929,0.67741,21 1930,0.485536,22 1931,1.08907,23 1932,-1.58696,23 1933,-3.42446,24 1934,1.28268,22 1935,-1.42007,24 1936,-1.26068,24 1937,1.54651,26 1938,2.51495,26 1939,0.242933,26 1940,1.2783,27 1941,-0.475994,26 1942,-1.1572,28 1943,3.43981,28 1944,1.90311,31 1945,-1.04735,31 1946,-0.936551,34 1947,2.71645,35 1948,-1.12239,38 1949,1.10823,39 1950,0.242021,42 1951,-0.319378,43 1952,3.03913,43 1953,0.221366,43 1954,0.403546,44 1955,-1.32982,43 1956,-2.90021,43 1957,-0.710716,49 1958,-0.248117,51 1959,-0.00204962,54 1960,1.24867,55 1961,-1.80041,54 1962,1.20836,54 1963,0.910828,53 1964,-0.516243,53 1965,-0.156999,53 1966,-0.542737,52 1967,0.920125,52 1968,0.572913,53 1969,1.97211,53 1970,-0.370344,52 1971,-0.802242,54 1972,-0.972817,53 1973,1.01495,53 1974,-1.39559,54 1975,-2.02558,55 1976,0.265783,54 1977,-0.424245,55 1978,-0.182724,54 1979,1.3388,49 1980,0.0449784,52 1981,2.25436,49 1982,-1.19404,50 1983,0.690009,50 1984,-0.81153,51 1985,1.36777,52 1986,-0.489473,51 1987,1.76183,53 1988,-0.175058,51 1989,-0.430022,53 1990,-2.05065,51 1991,-0.0653435,50 1992,-0.136008,50 1993,1.18667,45 1994,0.267618,45 1995,0.541495,52 1996,0.418173,51 1997,1.7301,50 1998,3.60456,52 1999,0.307252,53 2000,1.87646,53 2001,1.19806,52 2002,4.40785,52 2003,2.91217,52 2004,0.59359,54 2005,2.71137,52 2006,2.82824,52 2007,1.86168,50 2008,0.983971,51 2009,2.46762,47 2010,4.05617,52 2011,2.17731,50 2012,0.782825,50 2013,1.61952,49 2014,2.60241,48 2015,2.33026,48 2016,2.85332,41 2017,3.51484,43 2018,2.56191,41 2019,3.71364,37 2020,3.29628,35 2021,2.39612,35