Year,Value,NumPoints
1949,-22.2032,1872
1950,-22.0755,1872
1951,-21.9836,1872
1952,-21.7554,1872
1953,-21.7929,1872
1954,-21.9084,1872
1955,-22.0902,1872
1956,-22.1139,1872
1957,-21.832,1872
1958,-21.2766,1872
1959,-21.5349,1872
1960,-21.7608,1872
1961,-21.6462,1872
1962,-21.7358,1872
1963,-21.8759,1872
1964,-22.0498,1872
1965,-21.9246,1872
1966,-21.5958,1872
1967,-21.6614,1872
1968,-21.617,1872
1969,-21.2346,1872
1970,-21.2587,1872
1971,-21.5472,1872
1972,-21.4333,1872
1973,-20.9376,1872
1974,-21.0833,1872
1975,-20.8022,1872
1976,-20.8406,1872
1977,-20.7165,1872
1978,-20.634,1872
1979,-20.7964,1872
1980,-20.6934,1872
1981,-20.6763,1872
1982,-20.8435,1872
1983,-20.7708,1872
1984,-20.9096,1872
1985,-20.8323,1872
1986,-20.9185,1872
1987,-20.6162,1872
1988,-20.543,1872
1989,-20.3547,1872
1990,-20.3575,1872
1991,-20.5771,1872
1992,-20.8024,1872
1993,-20.7483,1872
1994,-20.8518,1872
1995,-20.7996,1872
1996,-20.7188,1872
1997,-20.8075,1872
1998,-20.2603,1872
1999,-20.5953,1872
2000,-20.6574,1872
2001,-20.2733,1872
2002,-20.4165,1872
2003,-20.455,1872
2004,-20.3983,1872
2005,-20.3619,1872
2006,-20.1839,1872
2007,-20.2893,1872
2008,-20.3651,1872
2009,-20.2517,1872
2010,-19.7346,1872
2011,-20.0252,1872
2012,-20.2028,1872
2013,-20.213,1872
2014,-20.0423,1872
2015,-20.0682,1872
2016,-19.8999,1872
2017,-19.8642,1872
2018,-20.2125,1872
2019,-20.0546,1872
2020,-19.9131,1872
2021,-20.023,1872