Year Current U.S. Dollars 1970-01-01 3238.55684977329 1971-01-01 3498.17365152320 1972-01-01 4217.17358114253 1973-01-01 5342.16856044208 1974-01-01 6319.73903384837 1975-01-01 7169.10100559556 1976-01-01 7152.37513361051 1977-01-01 7751.37021575891 1978-01-01 9129.70618518080 1979-01-01 11820.84939283250 1980-01-01 12377.41164568770 1981-01-01 10372.23283474500 1982-01-01 9610.26630831575 1983-01-01 8022.65478128161 1984-01-01 7728.90669456943 1985-01-01 7774.39382903478 1986-01-01 10361.81598202550 1987-01-01 12616.16756592900 1988-01-01 14304.35696457850 1989-01-01 15166.43785075400 1990-01-01 18878.50596929880 1991-01-01 19532.54015045250 1992-01-01 20547.71178978970 1993-01-01 16516.47102722040 1994-01-01 16234.80901020120 1995-01-01 18461.06485815120 1996-01-01 19017.17459022410 1997-01-01 18353.05972184730 1998-01-01 18894.52149632270 1999-01-01 19261.71050388860 2000-01-01 21936.53010147080 2001-01-01 22228.84649289220 2002-01-01 24741.49357045620 2003-01-01 32776.44226987690 2004-01-01 38503.47961448570 2005-01-01 41282.02012197850 2006-01-01 43748.77215889990 2007-01-01 48582.80845508660 2008-01-01 47785.65908567930 2009-01-01 43339.37987465430 2010-01-01 39736.35406266990 2011-01-01 41098.76694172280 2012-01-01 38391.08086697850 2013-01-01 40619.71129777950 2014-01-01 42294.99472697170 2015-01-01 36038.26760445960 2016-01-01 37231.81567141540 2017-01-01 39146.54883609050