Year	current US$
1965	25619989.752004102
1966	28699988.520004593
1967	34382434.85633251
1968	38759968.9920248
1969	40439967.64802588
1970	2520001.008000403
1971	66642491.25242254
1972	34659786.829281
1973	103723404.25531915
1974	51700051.7000517
1975	66550066.55006655
1976	44330044.33004433
1977	12870012.87001287
1978	44860881.73567742
1979	42101612.780757695
1980	38789280.461654186
1981	69270581.89534192
1982	31772406.282628465
1983	62208333.74305267
1984	46464394.37517056
1985	46073100.2536989
1986	22800987.17868909
1987	32679220.371857814
1988	17891779.874990754
1989	34083934.21208841
1990	24707597.760308463
1991	24496786.241191823
1992	11332604.539139297
1993	36074240.787540756
1994	17590557.292127747
1995	22508604.1344635
1996	15032506.583187224
1997	10591883.786867913
1998	11162790.69767442
1999	14189295.498148898
2000	23263550.43654052
2001	13131505.28575699
2002	15986469.911088375
2003	15517603.699590692
2004	10261907.407528449
2005	23281685.189388078
2006	42574319.26188451
2007	56827245.83746928
2008	52462880.72509776
2009	24119929.75184233
2010	40471972.23602062
2011	71332552.97903171
2012	43425448.99424113
2013	38915163.181279436
2014	63289589.118596874
2015	19466564.495557964
2016	13525715.91126689
2017	58992904.45629853
2018	4818753.265461905
2019	27829428.28820279