Year Current U.S. Dollars 1960-01-01 231.025617243714 1961-01-01 245.031988332280 1962-01-01 254.701334086896 1963-01-01 250.787078237018 1964-01-01 288.163481655289 1968-01-01 312.822277421474 1969-01-01 313.817445557465 1970-01-01 330.885201724653 1971-01-01 376.889927162286 1972-01-01 388.104543264843 1973-01-01 468.842110341913 1974-01-01 1018.073912813570 1975-01-01 1151.817728686420 1976-01-01 1471.211338877920 1977-01-01 1592.028539361370 1978-01-01 1847.896566576110 1979-01-01 2852.393360276870 1980-01-01 3911.543003031530 1981-01-01 2735.548507606370 1982-01-01 2950.159182958830 1983-01-01 2738.137352338590 1984-01-01 3077.998472085060 1985-01-01 3099.881525407900 1986-01-01 2957.240513743940 1987-01-01 3475.096660751990 1988-01-01 3753.529910892070 1989-01-01 3852.149757870470 1990-01-01 10297.427665440500 2004-01-01 1391.816922995780 2005-01-01 1849.603910766990 2006-01-01 2351.812428588100 2007-01-01 3129.224922250950 2008-01-01 4521.032470198020 2009-01-01 3735.144836030710 2010-01-01 4502.749048257260 2011-01-01 5854.614497112120 2012-01-01 6651.122419811360 2013-01-01 6925.224045684870 2014-01-01 6703.074737229280 2015-01-01 4974.026930166700 2016-01-01 4609.600693523220 2017-01-01 5165.714156588290