Year	current US$
1965	152128949.22422427
1966	168180399.3610941
1967	193804154.20024657
1968	243873985.20054528
1969	358573643.4545171
1970	285174688.99559313
1971	375565598.58769166
1972	538461532.6770047
1973	589027612.607383
1974	1012373786.9008533
1975	1737487593.52776
1976	2436863167.699049
1977	2768660976.1544957
1978	2581615044.12762
1979	2645350350.6199265
1980	3659872655.942911
1981	3653714657.294259
1982	3912662439.8340898
1983	4201785520.5770707
1984	4200720076.0427074
1985	3945127863.5033517
1986	2985394251.139864
1987	2065000835.973347
1988	1477682903.4746141
1989	1594716923.744833
1990	2036467961.175294
1991	2333000000
1992	3071326575.405833
1993	3557299015.9786525
1994	3032440000
1995	3103872255.489022
1996	3255009980.03992
1997	3024591439.688716
1998	3123961538.4615383
1999	2978798449.612403
2000	3267573791.082269
2001	4117182630.376065
2002	4200264335.095567
2003	5073785815.891079
2004	5435643564.356436
2005	6642471264.367816
2006	7263323558.162268
2007	8252623147.777333
2008	8775002683.657476
2009	9694497316.64379
2010	12559888820.696272
2011	14609414912.057169
2012	5523195036.843708
2013	3088042772.7703595
2014	1770972031.2685814
2015	2134689048.0325794
2016	992768799.4888138
2017	1468506193.9131198
2018	1941315250.348337
2019	1668588194.1289113
2020	766921164.9867699
2021	781578269.6653156