Year	current US$
1976	547000000
1977	775000000
1978	903000000
1979	1076000000
1980	1427000000
1981	1576000000
1982	1513000000
1983	1405000000
1984	1449000000
1985	1599000000
1986	1529000000
1987	1731000000
1988	1894000000
1989	2086000000
1990	2264000000
1991	2174000000
1992	2842100000
1993	2885460000
1994	3180600000
1995	3664500000
1996	4239554642.4928904
1997	4430771471.35522
1998	4694769562.61265
1999	4548118724.6817
2000	4739520314.83402
2001	4431053076.83113
2002	3353200000
2003	4304820000
2004	5082380000
2005	6342850000
2006	7786962532.35824
2007	9915456721.039038
2008	11272813243.720781
2009	10409000073.157827
2010	12631416301.812643
2011	14295746453.738997
2012	14047685905.132622
2013	13487139926.795382
2014	13189837804.75958
2015	13005539726.884132
2016	13242351882.165052
2017	15274100120.491053
2018	15125130033.300276
2019	14610601598.32865
2020	9325805850.16923
2021	9315181530.146656
2022	14296798731.27166
2023	16331873502.124886