Year Current U.S. Dollars 1970-01-01 828.421680335959 1971-01-01 874.066335595898 1972-01-01 975.758800875955 1973-01-01 1143.620203095280 1974-01-01 1245.361224901430 1975-01-01 1560.112153575220 1976-01-01 1726.559448453030 1977-01-01 2037.897336978120 1978-01-01 2558.740255329380 1979-01-01 3195.552585747690 1980-01-01 3948.403126149760 1981-01-01 3898.243037439050 1982-01-01 3788.050632406460 1983-01-01 3527.040000139940 1984-01-01 3332.885356822560 1985-01-01 3322.421282991700 1986-01-01 4194.653939248320 1987-01-01 5083.669139206300 1988-01-01 5814.364771305230 1989-01-01 6040.609862259450 1990-01-01 7191.923602596170 1991-01-01 7558.277382574850 1992-01-01 8220.245517679400 1993-01-01 7296.310143553890 1994-01-01 8000.518004522320 1995-01-01 9114.358065213420 1996-01-01 9397.800918347240 1997-01-01 9679.882856977750 1998-01-01 10183.675989707700 1999-01-01 10648.988896011500 2000-01-01 11039.056507451100 2001-01-01 11021.786355464100 2002-01-01 11843.939020056300 2003-01-01 13689.989987991000 2004-01-01 15109.054968395900 2005-01-01 15835.346668788300 2006-01-01 16671.567199263800 2007-01-01 19375.569601363000 2008-01-01 21928.700674056200 2009-01-01 20675.582586206400 2010-01-01 21087.794693103600 2011-01-01 22840.202129250500 2012-01-01 21926.060395738700 2013-01-01 23816.666970682700 2014-01-01 25851.659332343100 2015-01-01 23759.028336388100 2016-01-01 24770.806573823700 2017-01-01 26945.983882114700