Year Current U.S. Dollars 1977-01-01 36370370.3703704 1978-01-01 45170370.3703704 1979-01-01 44296296.2962963 1980-01-01 59100000 1981-01-01 66218518.5185185 1982-01-01 72051851.8518518 1983-01-01 79925925.9259259 1984-01-01 89848148.1481481 1985-01-01 98585185.1851852 1986-01-01 112074074.0740740 1987-01-01 126348148.1481480 1988-01-01 143766666.6666670 1989-01-01 153374074.0740740 1990-01-01 166322222.2222220 1991-01-01 180437037.0370370 1992-01-01 191759259.2592590 1993-01-01 200418518.5185190 1994-01-01 215459259.2592590 1995-01-01 224037037.0370370 1996-01-01 236444444.4444440 1997-01-01 245781481.4814810 1998-01-01 258440740.7407410 1999-01-01 267740740.7407410 2000-01-01 335845814.8148150 2001-01-01 343119370.3703700 2002-01-01 337695740.7407410 2003-01-01 350091222.2222220 2004-01-01 374771481.4814810 2005-01-01 370370370.3703700 2006-01-01 390370370.3703700 2007-01-01 421375851.8518520 2008-01-01 458190185.1851850 2009-01-01 489074333.3333330 2010-01-01 493824407.4074070 2011-01-01 501025296.2962960 2012-01-01 485998000.0000000 2013-01-01 501979259.2592590 2014-01-01 523666333.3333330 2015-01-01 535095851.8518520 2016-01-01 581484037.0370370 2017-01-01 562540740.7407410