Year,Value,NumPoints 1900,-0.513137,7 1901,0.0709167,6 1902,-0.532567,7 1903,0.149532,7 1904,-1.34879,6 1905,-1.25554,7 1906,0.39738,7 1907,-0.711338,6 1908,1.40061,6 1909,0.69508,7 1910,1.65795,7 1911,-0.408011,5 1912,-1.02804,7 1913,0.269562,7 1914,1.33665,6 1915,-1.74023,6 1916,-0.0102817,6 1917,0.473001,5 1918,-0.284587,6 1919,0.199715,6 1920,0.117955,6 1921,0.427095,6 1922,0.152175,6 1923,-0.280654,6 1924,0.322111,6 1925,-0.494082,6 1926,1.20182,5 1927,0.523169,9 1928,-0.288382,9 1929,-0.610016,13 1930,0.185747,13 1931,0.903273,11 1932,1.06367,12 1933,-0.0174821,20 1934,0.267815,20 1935,0.697884,25 1936,0.986977,32 1937,0.143855,34 1938,0.603235,34 1939,0.226677,35 1940,-0.483151,39 1941,1.00214,38 1942,0.0630268,42 1943,0.0732064,44 1944,0.620924,42 1945,0.507517,45 1946,-0.669295,45 1947,-0.00715085,46 1948,0.0304859,47 1949,-0.333457,48 1950,-1.25747,48 1951,0.239253,50 1952,1.0815,50 1953,0.611232,49 1954,0.0158708,50 1955,-0.306499,51 1956,-0.240006,52 1957,-0.492532,52 1958,0.0456403,51 1959,0.692651,52 1960,0.0831943,51 1961,-0.2065,53 1962,-0.603843,53 1963,-0.534405,53 1964,-0.488846,53 1965,-0.244028,53 1966,-0.287513,53 1967,-0.0988226,53 1968,0.257171,53 1969,0.606214,53 1970,0.157728,53 1971,1.22496,53 1972,-0.465958,53 1973,0.479884,53 1974,0.627886,53 1975,-0.0382065,53 1976,-0.181342,53 1977,-0.0933861,53 1978,-0.292132,53 1979,-1.0114,53 1980,0.921919,53 1981,-0.220305,53 1982,0.207503,53 1983,0.842591,52 1984,-0.179384,52 1985,-0.382708,52 1986,-0.319954,52 1987,-0.0765751,53 1988,0.505366,52 1989,-0.24365,52 1990,0.176314,52 1991,2.10958,52 1992,-0.652996,51 1993,0.109229,52 1994,0.114774,50 1995,1.19543,49 1996,-0.406281,44 1997,0.79249,47 1998,0.126377,45 1999,0.232269,44 2000,0.0955169,47 2001,0.521527,46 2002,1.07889,47 2003,1.78992,46 2004,0.377873,42 2005,1.3336,45 2006,1.01739,45 2007,1.64116,44 2008,0.931601,44 2009,0.793706,42 2010,1.36586,42 2011,1.08882,42 2012,0.69055,42 2013,0.353802,41 2014,1.41497,39 2015,1.26328,41 2016,1.16655,39 2017,0.73337,38 2018,1.37367,35 2019,1.38772,33 2020,1.57202,31 2021,1.33456,35