Year	current US$
1970	71740000.15482308
1971	79850001.40592456
1972	100990000.55529179
1973	114860002.25879253
1974	131179998.28793086
1975	156520001.27919
1976	138389999.38406053
1977	159590000.9721523
1978	195250007.44312984
1979	233699999.12939915
1980	246130004.6872345
1981	197129999.42153737
1982	161899997.11699802
1983	134899999.2497266
1984	128330002.63944271
1985	146319999.2403389
1986	207740005.841479
1987	203980003.0756745
1988	212109994.73743188
1989	163909998.383373
1990	244029999.2915243
1991	160369997.82547346
1992	196559999.05616042
1993	156450000.712648
1994	126230000.46238318
1995	107409999.4152784
1996	119140000.80525868
1997	128170001.94638969
1998	161810001.4906377
1999	93769999.34390181
2000	106149999.87743792
2001	128639997.35936515
2002	191409995.83154926
2003	895970004.9310927
2004	393749988.16475284
2005	279010000.7802246
2006	388220011.726022
2007	376590004.734695
2008	418660005.7315087
2009	456640003.68118286
2010	926549989.3575909
2011	470559999.07106125
2012	348170003.3061212
2013	381930000.6479022
2014	372879999.7717146
2015	272399997.10023385
2016	292839997.2952902
2017	313680002.0467494
2018	316169996.6937305
2019	274720004.95344347