Year	current US$
1978	397700000
1979	444700000
1980	638400000
1981	562300000
1982	389400000
1983	320800000
1984	280700000
1985	249200000
1986	179200000
1987	207400000
1988	260400000
1989	408100000
1990	370100000
1991	352300000
1997	281700000
1998	278000000
1999	297600000
2000	322326600
2001	353126600
2002	360600000
2003	387800000
2004	417800000
2005	387124725.184782
2006	487540595.298691
2007	806904092.369695
2008	804951458.25286
2009	640203275.608027
2010	849415988.1526821
2011	1052001710.2244
2012	1290465337.8746061
2013	1770149436.6246889
2014	1595535627.927163
2015	1380617983.880395
2016	1338399387.4731328
2017	1416067612.8147764
2018	1615852503.9326265
2019	1473517224.4694357
2020	1040748876.835079
2021	1276053920.2193859
2022	1854305159.6248264