Year,Value,NumPoints 1949,3.52097,51 1950,3.22934,51 1951,4.52223,51 1952,3.3402,51 1953,2.78447,51 1954,4.31728,51 1955,2.9399,51 1956,3.23079,51 1957,2.62878,51 1958,3.55423,51 1959,2.64045,51 1960,2.35163,51 1961,3.73444,51 1962,3.04187,51 1963,4.56408,51 1964,2.25551,51 1965,4.08925,51 1966,3.57781,51 1967,3.41042,51 1968,2.42253,51 1969,3.91143,51 1970,2.85817,51 1971,3.04566,51 1972,2.93255,51 1973,3.63324,51 1974,2.7763,51 1975,2.57184,51 1976,2.23983,51 1977,2.74549,51 1978,3.34681,51 1979,3.98545,51 1980,3.4949,51 1981,3.53803,51 1982,3.48049,51 1983,2.7352,51 1984,3.0137,51 1985,2.68468,51 1986,3.67742,51 1987,3.34923,51 1988,2.97336,51 1989,3.94584,51 1990,2.88309,51 1991,2.0041,51 1992,3.08227,51 1993,2.68721,51 1994,4.07566,51 1995,2.31324,51 1996,2.95144,51 1997,2.47619,51 1998,4.0481,51 1999,3.00972,51 2000,3.23016,51 2001,2.67108,51 2002,2.68814,51 2003,3.54691,51 2004,2.60741,51 2005,2.51576,51 2006,3.2038,51 2007,2.47196,51 2008,2.69408,51 2009,3.21342,51 2010,3.60905,51 2011,3.78242,51 2012,3.8277,51 2013,2.61533,51 2014,2.76644,51 2015,2.84403,51 2016,2.92932,51 2017,2.73771,51 2018,3.84274,51 2019,2.77577,51