Year,Value,NumPoints
1949,-18.7854,1872
1950,-18.7223,1872
1951,-18.332,1872
1952,-18.4296,1872
1953,-18.0187,1872
1954,-19.1544,1872
1955,-17.6457,1872
1956,-19.2846,1872
1957,-17.3057,1872
1958,-18.2166,1872
1959,-18.1214,1872
1960,-18.411,1872
1961,-18.0484,1872
1962,-19.015,1872
1963,-19.7408,1872
1964,-18.962,1872
1965,-18.4324,1872
1966,-19.4265,1872
1967,-19.6814,1872
1968,-17.6116,1872
1969,-18.5808,1872
1970,-17.2682,1872
1971,-18.1267,1872
1972,-18.1638,1872
1973,-18.1,1872
1974,-18.067,1872
1975,-17.6033,1872
1976,-19.4754,1872
1977,-18.5877,1872
1978,-17.8624,1872
1979,-18.2443,1872
1980,-18.1213,1872
1981,-18.7018,1872
1982,-17.9131,1872
1983,-18.5458,1872
1984,-17.9104,1872
1985,-18.5381,1872
1986,-17.1186,1872
1987,-17.9027,1872
1988,-16.7367,1872
1989,-16.6969,1872
1990,-17.4578,1872
1991,-17.1353,1872
1992,-17.2286,1872
1993,-17.7535,1872
1994,-17.6526,1872
1995,-16.8598,1872
1996,-17.6025,1872
1997,-18.1266,1872
1998,-18.0762,1872
1999,-16.8882,1872
2000,-17.66,1872
2001,-16.7667,1872
2002,-16.548,1872
2003,-17.087,1872
2004,-16.5719,1872
2005,-15.7849,1872
2006,-17.2076,1872
2007,-17.1906,1872
2008,-17.6511,1872
2009,-16.146,1872
2010,-16.2406,1872
2011,-16.6164,1872
2012,-15.8345,1872
2013,-17.1196,1872
2014,-16.6646,1872
2015,-16.7793,1872
2016,-14.9783,1872
2017,-16.0159,1872
2018,-17.6594,1872
2019,-15.9972,1872
2020,-17.2279,1872
2021,-15.6884,1872
2022,-15.7665,1872
2023,-17.4818,1872