Year current US$ 1970 916395434.347437 1971 1041719995.35703 1972 982859583.760057 1973 1289781270.35324 1974 3622922986.33105 1975 3978822838.54681 1976 4761356584.32263 1977 5769463973.00358 1978 5579462731.67802 1979 13518523059.3597 1980 12215194731.8579 1981 5368283009.66741 1982 4162331649.28712 1983 3927764577.71283 1984 3801075370.77421 1985 3562644885.75578 1986 1635432391.20897 1987 1994849064.53338 1988 2323404937.56306 1989 3130443132.96045 1990 5491278842.46852 1991 3756285480.96522 1992 3739131445.76599 1993 3256148629.88551 1994 3013250949.31527 1995 2777405466.54977 1996 3536723073.96559 1997 3379646667.29109 1998 1979752475.62053 1999 2754445754.1796 2000 4522119170.5297 2001 3439194934.94252 2002 3284667811.81294 2003 4146121939.43132 2004 6443300505.90423 2005 10446247273.0448 2006 13902724472.8618 2007 15166306259.268 2008 20847723599.2791 2009 10137931366.4032 2010 13535598126.8613 2011 1779281143.4559 2012 15514099607.2491 2013 7189371999.86084 2014 2086337542.29686 2015 891048864.118788 2016 659924917.48345 2017 2604676784.22405 2018 4957996625.35927 2019 5390499703.18887 2020 612601859.748227 2021 5829662987.51809