Year	current US$
1970	34299999.833107024
1971	37699999.15361401
1972	51579998.85082246
1973	56329999.56607812
1974	82710001.46865843
1975	86099999.96423721
1976	75000000.45448539
1977	61999999.16553493
1978	86770000.51736835
1979	111930002.35036011
1980	185020003.7285686
1981	236980001.89289454
1982	252460002.15411204
1983	210060002.9490888
1984	200299997.9108571
1985	212380000.8744001
1986	343869998.641312
1987	384130001.26183003
1988	416270000.861958
1989	461899999.4546172
1990	712870007.1871281
1991	614030004.7956413
1992	548780003.3651292
1993	421410001.66535413
1994	338350001.66110694
1995	361650001.21854246
1996	299040002.7260182
1997	577980009.7066905
1998	269410002.75313854
1999	245360004.54425803
2000	201090001.0243058
2001	158789999.80539083
2002	623070008.2611297
2003	1526529999.8708065
2004	1047249998.4353778
2005	309590003.96728504
2006	416490008.44359404
2007	519780001.34229636
2008	359160000.3242492
2009	403430000.513792
2010	476839993.95370483
2011	1663920033.1419706
2012	470319997.1970172
2013	787009983.4762517
2014	527230000.0563264
2015	534460003.35179305
2016	334190004.98577964
2017	327859997.883439
2018	319399999.5738268
2019	354939995.73588365