Year Current U.S. Dollars 1990-01-01 1731.20953112388 1991-01-01 2235.54108862521 1992-01-01 2459.02068468253 1993-01-01 2497.19524116689 1994-01-01 2874.82531084520 1995-01-01 3682.79121526652 1996-01-01 4140.98354114142 1997-01-01 4116.92624282821 1998-01-01 4510.41311705999 1999-01-01 4389.97641534208 2000-01-01 4492.72760355938 2001-01-01 4981.19861880170 2002-01-01 5196.93292103894 2003-01-01 5693.37776322597 2004-01-01 6681.17881781198 2005-01-01 8021.00365533726 2006-01-01 9038.73084652356 2007-01-01 11255.43669829990 2008-01-01 14001.44688198040 2009-01-01 11527.59322798250 2010-01-01 12599.53358187070 2011-01-01 13893.50925900100 2012-01-01 13145.53926278650 2013-01-01 13781.06260538130 2014-01-01 14342.40201664670 2015-01-01 12566.48344297160 2016-01-01 12415.04329228990 2017-01-01 13811.66424368080