Year,Value,NumPoints
1949,-53.609,1872
1950,-53.6833,1872
1951,-52.5116,1872
1952,-51.5846,1872
1953,-51.98,1872
1954,-52.5732,1872
1955,-52.6785,1872
1956,-51.6856,1872
1957,-52.2969,1872
1958,-50.091,1872
1959,-52.0624,1872
1960,-50.7522,1872
1961,-52.0487,1872
1962,-50.7566,1872
1963,-50.9856,1872
1964,-49.0235,1872
1965,-49.8621,1872
1966,-51.7108,1872
1967,-50.0933,1872
1968,-50.2757,1872
1969,-50.1742,1872
1970,-49.8118,1872
1971,-50.5877,1872
1972,-49.5839,1872
1973,-51.0095,1872
1974,-51.0407,1872
1975,-51.4623,1872
1976,-51.8301,1872
1977,-51.7297,1872
1978,-51.6334,1872
1979,-49.9456,1872
1980,-49.7401,1872
1981,-49.9059,1872
1982,-50.2414,1872
1983,-49.5166,1872
1984,-50.438,1872
1985,-50.5419,1872
1986,-49.7255,1872
1987,-51.4736,1872
1988,-50.1831,1872
1989,-51.5741,1872
1990,-50.8891,1872
1991,-49.9644,1872
1992,-49.9237,1872
1993,-50.7626,1872
1994,-51.0763,1872
1995,-51.2516,1872
1996,-51.2488,1872
1997,-51.2796,1872
1998,-51.736,1872
1999,-51.2984,1872
2000,-51.6619,1872
2001,-52.3406,1872
2002,-50.4515,1872
2003,-51.9477,1872
2004,-51.3867,1872
2005,-51.3047,1872
2006,-52.4075,1872
2007,-51.6372,1872
2008,-52.8246,1872
2009,-52.3636,1872
2010,-52.7314,1872
2011,-52.2638,1872
2012,-52.4572,1872
2013,-52.0763,1872
2014,-51.8063,1872
2015,-52.7717,1872
2016,-51.7898,1872
2017,-51.7828,1872
2018,-52.7771,1872
2019,-51.6699,1872
2020,-52.4674,1872
2021,-52.8064,1872