Year	current US$
1960	183179975.97112632
1961	166354556.61811528
1962	232483194.2281738
1963	233218642.82172915
1964	223808511.76712266
1965	250836078.3021544
1966	237017341.02437893
1967	248911546.60038403
1968	304528170.60927826
1969	384128076.55833024
1970	374567196.3628651
1971	449256611.04723877
1972	555039781.8357795
1973	714520388.9687998
1974	1242591949.4415104
1975	1461385501.6909375
1976	1490583475.6937804
1977	1398290602.0751455
1978	1376861356.8680642
1979	1900127411.627026
1980	2380891748.679882
1981	2427631163.140565
1982	2268031543.2745056
1983	2331285386.502494
1984	2174468527.3620033
1985	1960935107.6136513
1986	1497286356.1391218
1987	1778676817.0337534
1988	1774447475.5020642
1989	2962782912.2496657
1990	3488165259.684462
1991	3168250000
1992	3479921426.47904
1993	3816418520.7250924
1994	3346540000
1995	3537504990.01996
1996	4388662674.650699
1997	4702704280.1556425
1998	4640692307.692307
1999	5129922480.620155
2000	6839334310.236549
2001	7464741325.576563
2002	8216795445.302969
2003	7030359682.9912615
2004	10147425742.574257
2005	11844406130.268198
2006	13167057673.509287
2007	15617340808.970766
2008	19741839911.274727
2009	15724550983.911074
2010	19747456954.106236
2011	13081933156.114717
2012	3331967948.292643
2013	1661482225.6139302
2014	1508537235.5117462
2015	2353296639.1331143
2016	2731227398.5679874
2017	3165874596.026564
2018	3206830229.917888
2019	2938069170.951805
2020	1648856243.5905287
2021	2226608572.933665