Year	constant 2010 US$
1970	224410376168.28
1971	208809482249.373
1972	217681960745.316
1973	252818594438.56
1974	276710956810.44
1975	216419565046.241
1976	253234870051.252
1977	237784765565.08
1978	236585703975.947
1979	260061371422.351
1980	289028002273.086
1981	264125820687.143
1982	259641317624.012
1983	249249851553.916
1984	274139695993.606
1985	283113124108.242
1986	293394218074.293
1987	314637193155.088
1988	331374153605.848
1989	345914374782.173
1990	361954203626.911
1991	367607281749.944
1992	361044279657.233
1993	320237384890.503
1994	337328452867.305
1995	365454002801.829
1996	363893698349.895
1997	374049517523.034
1998	386580162188.714
1999	404882648634.827
2000	428822547779.061
2001	438827250121.739
2002	458150338053.855
2003	459804809084.63
2004	469483703011.066
2005	468660705653.938
2006	493576440737.554
2007	505945373177.123
2008	488622033731.532
2009	413828606067.161
2010	436438120845.07
2011	432011629427.318
2012	367635727208.646
2013	346918417651.412
2014	350433705043.249
2015	358978361865.333
2016	372325381765.859
2017	380261068222.949
2018	392128573563.374