Year	current US$
1970	464000000
1971	359000000
1972	299000000
1973	293000000
1974	228000000
1975	305000000
1976	214000000
1977	164000000
1978	177000000
1979	230000000
1980	302000000
1981	344000000
1982	565000000
1983	883000000
1984	1045000000
1985	1343000000
1986	1184000000
1987	1281000000
1988	1086000000
1989	1016000000
1990	1168000000
1991	1241000000
1992	660000000
1993	679000000
1994	1044000000
1995	781000000
1996	355000000
1997	541000000
1998	492920000.10982203
1999	609030016.8357792
2000	593190000.4241607
2001	1078499989.9119148
2002	1047060002.908111
2003	1596139975.415544
2004	1239460012.4433637
2005	1410560006.4843895
2006	1795069996.3644147
2007	1244840003.388002
2008	1699060020.780192
2009	1852450011.7786229
2010	2189700026.4339128
2011	2164759986.523539
2012	1639620007.9750268
2013	1477040022.7326894
2014	1428460009.6084173
2015	1602129968.412221
2016	1458600001.804529
2017	1662459989.7786975
2018	1724799990.1827426
2019	1680509986.5254018
2020	1932540024.5413175
2021	2250409993.7435236
2022	2130840003.1719363