Year	current US$
1970	33475053944.6281
1971	36515132716.0668
1972	43016062231.4689
1973	52179837891.9664
1974	57535393690.2478
1975	72500681527.1942
1976	77851283957.8568
1977	81357498886.733
1978	89586459946.1205
1979	105804623020.194
1980	122003609516.555
1981	110458839101.259
1982	96518342242.4785
1983	88153191216.5042
1984	92123826704.1
1985	96109714966.0826
1986	127839312300.394
1987	156159516442.123
1988	175923241934.6
1989	184272166369.408
1990	219795869048.114
1991	228785222737.746
1992	233145100415.581
1993	171853247330.814
1994	189869632652.555
1995	223826209651.079
1996	243620338456.049
1997	223331282590.433
1998	226160501275.725
1999	232134216370.059
2000	222027905098.026
2001	203355468496.913
2002	223889286670.34
2003	286522283563.305
2004	326747434965.425
2005	335249772071.934
2006	367328308218.702
2007	428583877503.817
2008	450366238033.956
2009	369325809203.493
2010	423786780953.711
2011	488078480364.854
2012	470536872562.006
2013	500080240620.801
2014	495514182187.217
2015	425025439105.011
2016	432747589460.25
2017	459032738907.882
2018	470799099793.76
2019	458007910571.367
2020	469238771521.351
2021	539858010828.979