Year Current U.S. Dollars 1990-01-01 2315.13260525490 1991-01-01 2201.86742494412 1992-01-01 2364.14970241952 1993-01-01 2490.81471000362 1994-01-01 2826.91918765574 1995-01-01 3516.26421172291 1996-01-01 3769.17244762504 1997-01-01 3738.18107499767 1998-01-01 4099.31781232330 1999-01-01 3979.37037676572 2000-01-01 3946.58268142708 2001-01-01 4344.83152238149 2002-01-01 4924.77867066714 2003-01-01 5945.88883575672 2004-01-01 7165.40783356519 2005-01-01 8347.54651520871 2006-01-01 9465.75112973506 2007-01-01 11998.30281965230 2008-01-01 14549.90732391680 2009-01-01 12258.57241376180 2010-01-01 12556.49160471150 2011-01-01 13881.25281885070 2012-01-01 13003.33615979120 2013-01-01 13717.08392845800 2014-01-01 14144.48575071820 2015-01-01 12456.42652351510 2016-01-01 12748.92338525450 2017-01-01 14122.33584959650