Year,Value,NumPoints
1949,-58.697,1872
1950,-58.1157,1872
1951,-58.3968,1872
1952,-58.3689,1872
1953,-58.3179,1872
1954,-58.3631,1872
1955,-58.3133,1872
1956,-57.948,1872
1957,-58.1586,1872
1958,-58.2283,1872
1959,-58.3634,1872
1960,-58.2391,1872
1961,-58.5865,1872
1962,-58.4941,1872
1963,-57.4726,1872
1964,-57.1336,1872
1965,-57.9304,1872
1966,-57.9033,1872
1967,-57.6375,1872
1968,-57.7944,1872
1969,-57.5603,1872
1970,-57.7145,1872
1971,-57.5929,1872
1972,-57.6206,1872
1973,-57.943,1872
1974,-58.3813,1872
1975,-56.7783,1872
1976,-57.5029,1872
1977,-56.9813,1872
1978,-56.5303,1872
1979,-56.2918,1872
1980,-56.2623,1872
1981,-56.8458,1872
1982,-56.0067,1872
1983,-56.2894,1872
1984,-56.3908,1872
1985,-57.0074,1872
1986,-56.7152,1872
1987,-56.7365,1872
1988,-56.2615,1872
1989,-56.683,1872
1990,-55.9444,1872
1991,-56.141,1872
1992,-55.8866,1872
1993,-56.8071,1872
1994,-56.7987,1872
1995,-56.9186,1872
1996,-56.7144,1872
1997,-56.9601,1872
1998,-57.0844,1872
1999,-57.4695,1872
2000,-57.342,1872
2001,-56.8038,1872
2002,-56.5943,1872
2003,-56.8024,1872
2004,-56.7358,1872
2005,-56.5946,1872
2006,-56.9991,1872
2007,-56.8311,1872
2008,-57.0031,1872
2009,-56.9124,1872
2010,-56.6503,1872
2011,-57.0756,1872
2012,-56.72,1872
2013,-56.3595,1872
2014,-56.5985,1872
2015,-56.696,1872
2016,-56.5329,1872
2017,-56.6381,1872
2018,-56.7341,1872
2019,-56.6881,1872
2020,-56.039,1872
2021,-57.2507,1872