Year	2010 U.S. Dollars
1968-01-01	3445.17308656409
1969-01-01	3740.98128281419
1970-01-01	4337.42926025046
1971-01-01	4712.70640119767
1972-01-01	5326.46283529763
1973-01-01	5789.26020030040
1974-01-01	6191.26732748642
1975-01-01	5874.58107753942
1976-01-01	6578.14987777804
1977-01-01	6608.14125344952
1978-01-01	6102.47224986809
1979-01-01	6193.38693814182
1980-01-01	5942.02477446277
1981-01-01	5825.15923138559
1982-01-01	5527.12441878769
1983-01-01	5214.85449916170
1984-01-01	4976.49212672758
1985-01-01	4791.88702585601
1986-01-01	4679.57877609746
1987-01-01	4540.66291289097
1988-01-01	4541.36425061714
1989-01-01	4530.74830725243
1990-01-01	4951.99199676053
1991-01-01	5029.44640414516
1992-01-01	5175.01024596547
1993-01-01	5200.08999228292
1994-01-01	5223.36852275998
1995-01-01	5235.32260832488
1996-01-01	5368.30220031561
1997-01-01	5434.90542675285
1998-01-01	5567.86067895076
1999-01-01	5559.08503497300
2000-01-01	5764.20589652940
2001-01-01	5725.07061321247
2002-01-01	5711.59304595238
2003-01-01	5911.15053433584
2004-01-01	6264.60939224820
2005-01-01	6451.70765738061
2006-01-01	6697.66956786532
2007-01-01	6892.97489528554
2008-01-01	7046.01882868534
2009-01-01	6933.16079308517
2010-01-01	7126.77193263835
2011-01-01	7234.39606561510
2012-01-01	7363.62521352804
2013-01-01	7410.03312958947
2014-01-01	7476.89426100287
2015-01-01	7523.60791131852
2016-01-01	7732.76174947725
2017-01-01	7740.07857194197