Year	current US$
1970	668000000
1971	668000000
1972	386000000
1973	391000000
1974	293000000
1975	805000000
1976	475000000
1977	292000000
1978	384000000
1979	337000000
1980	364000000
1981	429000000
1982	402000000
1983	399000000
1984	453000000
1985	446000000
1986	468000000
1987	359000000
1988	635000000
1989	567000000
1990	460000000
1991	421000000
1992	315000000
1993	307000000
1994	215000000
1995	36000000
1996	-33000000
1997	9000000
1998	-17450001.925230034
1999	250820000.3653765
2000	179970000.17762184
2001	863660012.2079258
2002	667159978.5387521
2003	711040006.5481665
2004	1000469977.5278571
2005	1859930057.4064307
2006	2111199958.0413103
2007	2169290037.080651
2008	2737100089.259446
2009	3810679909.6670046
2010	4396950041.517625
2011	4598619957.208635
2012	3651580072.40296
2013	2634869920.799506
2014	3021049981.1172504
2015	2805019947.1265144
2016	2480620014.98044
2017	2284289976.2243004
2018	2031700007.3418036
2019	2388069949.20969
2020	1842039970.1297336
2021	2515249960.184104
2022	2194040005.9707475