Year	current US$
1970	25543561.4719325
1971	25329318.4767507
1972	26133184.7295361
1973	27888203.2954668
1974	53911155.2870886
1975	43586801.7956697
1976	54066524.4746102
1977	72961261.8779607
1978	182952942.250854
1979	218958174.322584
1980	247671859.019172
1981	255543073.270141
1982	292975153.194545
1983	306775387.846814
1984	334841778.92992
1985	337727070.054113
1986	382020856.897548
1987	406856958.137579
1988	366275761.058867
1989	328778301.512467
1990	320699251.44018
1991	308809537.104817
1992	312142745.810325
1993	280314539.001791
1994	257631233.234294
1995	301966975.155829
1996	289788988.796887
1997	301795660.592043
1998	326881312.932106
1999	325396301.111983
2000	369970375.50283
2001	390775088.269737
2002	400794500.660354
2003	408077227.1226
2004	462922843.14884
2005	542196709.285537
2006	592399127.820819
2007	677498979.187793
2008	769844922.938588
2009	854444364.66333
2010	932130552.36543
2011	970337048.96569
2012	988225601.851554
2013	1009949002.98402
2014	1059798448.15673
2015	1089373304.33862
2016	1230943478.5221
2017	1219699324.30994
2018	1259213175.41759
2019	1203455356.72625
2020	949608616.861958
2021	1346617145.56954