Year,Value,NumPoints 1950,-0.569345,2808 1951,-0.385739,2808 1952,0.572442,2808 1953,0.851515,2808 1954,0.421427,2808 1955,-0.120131,2808 1956,-0.380555,2808 1957,0.141212,2808 1958,0.422872,2808 1959,-0.116686,2808 1960,0.225561,2808 1961,-0.12843,2808 1962,0.114449,2808 1963,0.307371,2808 1964,-0.395828,2808 1965,-0.382637,2808 1966,-0.258785,2808 1967,-0.158838,2808 1968,0.013456,2808 1969,0.185909,2808 1970,-0.165878,2808 1971,-0.158003,2808 1972,-1.15729,2808 1973,0.428207,2808 1974,-0.373982,2808 1975,-0.188065,2808 1976,-0.029791,2808 1977,0.713522,2808 1978,-0.234525,2808 1979,-0.171583,2808 1980,0.408804,2808 1981,1.46111,2808 1982,-0.623713,2808 1983,0.14427,2808 1984,0.128933,2808 1985,-0.104043,2808 1986,0.377647,2808 1987,1.18898,2808 1988,0.620277,2808 1989,-0.0498319,2808 1990,0.299442,2808 1991,0.577819,2808 1992,0.112264,2808 1993,0.283651,2808 1994,0.485555,2808 1995,0.561609,2808 1996,-0.0368715,2808 1997,0.525726,2808 1998,1.86514,2808 1999,1.26525,2808 2000,0.869412,2808 2001,1.3879,2808 2002,0.775099,2808 2003,0.994324,2808 2004,0.41999,2808 2005,1.35274,2808 2006,1.83209,2808 2007,0.951377,2808 2008,0.423166,2808 2009,0.582093,2808 2010,1.92016,2808 2011,1.09073,2808 2012,1.70452,2808 2013,0.66166,2808 2014,0.68959,2808 2015,1.43137,2808 2016,2.07735,2808 2017,1.6296,2808 2018,0.900524,2808 2019,1.08254,2808