Year	constant 2015 US$
1970	51335521857.68488
1971	52308932657.49082
1972	53940898312.49273
1973	55121628562.17113
1974	50629495420.66197
1975	48902490300.22217
1976	55495006854.86436
1977	55944482810.63114
1978	52399263528.55476
1979	41914546181.63356
1980	44636882778.49549
1981	48034550790.83956
1982	55948485926.43358
1983	60924746949.14582
1984	64451837801.58721
1985	67647253235.72039
1986	79116001080.27274
1987	85559270189.27155
1988	84021441550.279
1989	85049003906.92413
1990	85204531650.1105
1991	100142336406.69093
1992	109036683793.57993
1993	109439260135.41306
1994	116142443572.8995
1995	122194013215.3365
1996	129726447237.4575
1997	141702257335.7704
1998	140509532374.668
1999	146121849750.4559
2000	156003098080.24277
2001	168714243353.89676
2002	170826507868.25708
2003	172400694795.01102
2004	174906129488.3873
2005	178156061950.00717
2006	193459805504.27298
2007	207729414051.10883
2008	215576117364.67517
2009	229262094196.35718
2010	237780219646.42047
2011	243659506920.34406
2012	256246955917.3982
2013	264251788785.24542
2014	273027719410.01202
2015	297126609667.339
2016	311374989607.5046
2017	293839141874.0577
2018	304207329401.96173
2019	320238049352.25604
2020	339213535389.16364
2021	345162865573.569