Year	current US$
1975	450000000
1976	806000000
1977	239000000
1978	352000000
1979	1471500000
1980	1115000000
1981	184050000
1982	242900000
1983	175700000
1984	253300000
1985	474410000
1986	239220000
1987	143980000
1988	4272729999.9999995
1989	396070000
1990	800770000
1991	4548690000
1992	15738610000
1993	49764530000
1994	112828000000
1995	31903600000
1996	31303500000
1997	38206640000
1998	26064460000
1999	11862190000
2000	9145630000
2001	6662000000
2002	1168610000
2003	2929510000
2004	4551450000
2005	5257770000
2006	3387990000
2007	4845000000
2008	3337600000
2009	1510580000
2010	2544790000
2011	2454310000
2012	1462140000
2013	2237310000
2014	3522520000
2015	2699820000
2016	4360745593.33447
2017	6592777693.4465
2018	4571170000
2019	2983330000
2020	2849900000
2021	2619420000
2022	7960630000