Year	current US$
1970	408169996.83715403
1971	467459998.31520027
1972	496369996.8419968
1973	553389996.6813624
1974	737039997.8961794
1975	1043459994.887934
1976	1246960009.8635998
1977	1561879996.60708
1978	2030190006.1499326
1979	2126670002.3170557
1980	2635059995.207935
1981	2774079986.516386
1982	2897969993.38828
1983	2932049993.4796247
1984	3185930005.062372
1985	3711490006.214008
1986	3749919988.0771337
1987	4221080016.4435053
1988	4065529981.9409847
1989	3890319986.9245296
1990	6078449986.973779
1991	8397710029.289127
1992	6309729994.283991
1993	5019310002.006591
1994	5718039972.981438
1995	4555870004.197583
1996	5126060016.44768
1997	4420610038.45185
1998	4486070029.754191
1999	4251950019.3987045
2000	3743200015.284121
2001	3866170009.4454
2002	4044729976.4771023
2003	7277369971.504437
2004	10287169939.639055
2005	27929870124.360554
2006	15819479904.811827
2007	16805830137.54339
2008	19515429944.820713
2009	12007940085.962418
2010	9890109962.98678
2011	11135849977.439268
2012	11099870011.724537
2013	12968889964.388683
2014	12605800024.7404
2015	11498470006.674528
2016	15201359974.380585
2017	16483440024.357292
2018	16339730059.3853
2019	16439980095.62865
2020	19260230113.55848
2021	20954750136.202213
2022	16289429959.671572