Year,Value,NumPoints
1981,274.653,872
1982,274.181,872
1983,274.914,871
1984,274.455,872
1985,274.072,872
1986,274.328,871
1987,274.537,872
1988,274.138,872
1989,274.089,872
1990,274.126,871
1991,274.214,872
1992,274.209,872
1993,274.558,872
1994,274.029,872
1995,274.068,872
1996,274.374,872
1997,274.417,871
1998,274.483,872
1999,273.966,872
2000,274.083,872
2001,274.2,872
2002,274.244,872
2003,274.947,872
2004,274.506,872
2005,274.132,871
2006,273.982,872
2007,273.541,872
2008,273.285,872
2009,273.446,872
2010,273.888,872
2011,273.691,872
2012,273.414,872
2013,273.601,872
2014,274.446,872
2015,274.844,872
2016,275.097,872
2017,274.157,872
2018,274.9,872
2019,274.892,872