Year	current US$
1970	13000000
1971	18438740.255
1972	18479927.78
1973	22245560.167
1974	24831670.77
1975	164378101.35
1976	240666842.69700003
1977	283075359.6469
1978	324359996.314
1979	262100002.53900003
1980	441505900.3859999
1981	453482195.615
1982	470368320.5797999
1983	288729999.8088
1984	354042964.5251
1985	402305927.34009993
1986	399083123.92340004
1987	370387776.7917999
1988	433074447.97049993
1989	459837037.74789995
1990	284133603.2985984
1991	395104020.4540179
1992	393299556.458246
1993	600922906.769491
1994	747827135.4667953
1995	842856382.5092818
1996	959856924.5009526
1997	1001892644.7643725
1998	1121998446.578178
1999	1231081488.774408
2000	1568925560.5706074
2001	1480835426.5468056
2002	1365242697.5412946
2003	1456191940.0259368
2004	1562174361.6080146
2005	1690325763.7231617
2006	1966573252.3729532
2007	2229781319.528083
2008	2765498654.1535363
2009	2757988180.2869177
2010	3966014496.5703883
2011	4445321875.788162
2012	4388198030.876848
2013	5168430405.977713
2014	5604278652.64468
2015	5448484258.872425
2016	5568999698.614476
2017	7480443417.589568
2018	7887836116.137676
2019	8067148473.199487
2020	6896576396.744649
2021	7939245928.172704
2022	8853700202.22404