Year	current US$
1970	52289999.95812774
1971	61009999.65891238
1972	65410000.052303046
1973	72620000.47788027
1974	75770000.67569317
1975	112360000.20988289
1976	110000000.81397592
1977	106029999.94903804
1978	134149999.49559574
1979	169150000.2946705
1980	234379999.36938295
1981	323430003.9410593
1982	280330001.10089767
1983	235510000.87708223
1984	231649998.02038077
1985	268040001.5264749
1986	304540001.2210011
1987	314099999.6960163
1988	358900000.2443792
1989	398029999.34554106
1990	358639998.6594916
1991	397410002.9468538
1992	338680002.3317339
1993	287510001.09314907
1994	235309997.63309965
1995	228240000.42676926
1996	277699998.06582916
1997	335659998.565912
1998	299520001.3220309
1999	260390000.72330236
2000	184179998.07000163
2001	155090000.13768667
2002	153209999.9450148
2003	169729999.4770438
2004	217570000.7081032
2005	225530000.86545947
2006	248630000.9191036
2007	249859999.68647945
2008	298830000.3409384
2009	316109999.343753
2010	301210000.872612
2011	250329999.46177
2012	251603083.64778748
2013	242795244.6267009
2014	255938044.2276596
2015	231711957.56085223
2016	217437283.9927674
2017	207811593.07525745
2018	204995924.56966642
2019	256994208.03785324
2020	288868141.2041188
2021	276896610.0215911
2022	293767942.3689842