Year,Value,NumPoints 1949,-2.26819,245 1950,-0.0292138,245 1951,-1.02795,245 1952,0.599523,245 1953,2.50553,245 1954,-0.473244,245 1955,-1.48253,245 1956,-0.541527,245 1957,-2.45356,245 1958,-0.832214,245 1959,-1.92078,245 1960,-1.32048,245 1961,-2.27415,245 1962,-3.17931,245 1963,-4.85205,245 1964,-0.647315,245 1965,-0.462774,245 1966,-3.36742,245 1967,0.299408,245 1968,-1.70083,245 1969,-1.46397,245 1970,-3.32681,245 1971,-1.90844,245 1972,-1.57902,245 1973,-1.74613,245 1974,-0.659627,245 1975,-0.662927,245 1976,-2.28114,245 1977,-5.54204,245 1978,-4.13774,245 1979,-4.86262,245 1980,-1.57222,245 1981,-2.04623,245 1982,-3.355,245 1983,-0.65132,245 1984,-2.56618,245 1985,-4.1295,245 1986,-0.0470286,245 1987,-1.63428,245 1988,-2.79065,245 1989,-0.264118,245 1990,0.918599,245 1991,-2.00619,245 1992,-0.516646,245 1993,-0.726928,245 1994,-2.45148,245 1995,-0.689879,245 1996,-2.0067,245 1997,-1.80251,245 1998,0.494345,245 1999,-0.129317,245 2000,-0.516574,245 2001,-1.91025,245 2002,0.0423324,245 2003,-1.18668,245 2004,-2.13621,245 2005,-0.515538,245 2006,2.57809,245 2007,-1.70177,245 2008,-2.00494,245 2009,-1.96032,245 2010,-2.32519,245 2011,-2.98662,245 2012,0.879255,245 2013,-1.26,245 2014,-2.21255,245 2015,-0.874873,245 2016,-1.31985,245 2017,-0.20302,245 2018,-1.24563,245 2019,-1.35961,245 2020,0.782451,245