Year Current U.S. Dollars 1977-01-01 1063.42011308049 1978-01-01 1198.50708271962 1979-01-01 1483.51597980311 1980-01-01 1789.58956778188 1981-01-01 2023.39994991844 1982-01-01 2268.78997758801 1983-01-01 2542.52727021750 1984-01-01 2946.24039380490 1985-01-01 3452.52251190745 1986-01-01 4220.96162054598 1987-01-01 4969.78188299583 1988-01-01 5944.67089296938 1989-01-01 6585.84024161042 1990-01-01 6889.00494893358 1991-01-01 7156.85342287330 1992-01-01 7296.55177266500 1993-01-01 7652.10297374500 1994-01-01 8218.59747894690 1995-01-01 7841.46403429469 1996-01-01 8379.57673916578 1997-01-01 8755.15649945473 1998-01-01 9115.23453172274 1999-01-01 9363.18663985440 2000-01-01 9932.02978773184 2001-01-01 9414.16061299198 2002-01-01 9443.06370219244 2003-01-01 9801.96706621506 2004-01-01 10419.31119512500 2005-01-01 11452.73880201560 2006-01-01 12812.76447043160 2007-01-01 14350.91904589940 2008-01-01 14797.36842316050 2009-01-01 13082.28165973860 2010-01-01 12174.69785945720 2011-01-01 11931.20410708350 2012-01-01 12517.55792909170 2013-01-01 12194.60876070710 2014-01-01 12946.98693636750 2015-01-01 13659.14791426440 2016-01-01 14462.17627946580 2017-01-01 15021.73818330740