Year	constant 2010 US$
1975	10555309285.7798
1976	11428372771.3266
1977	11734086263.6767
1978	11349825312.1091
1979	13813616119.2187
1980	12114956677.4363
1981	10621424773.0348
1982	12359075399.6086
1983	9656816766.67328
1984	13837914973.509
1985	13865604365.6072
1986	12896475642.1685
1987	13034922602.6597
1988	12753507964.6
1989	13316337240.7195
1990	14407525325.2444
1991	15205996979.0164
1992	14399048980.7245
1993	15156269091.1665
1994	15784083675.2717
1995	13471171800.6158
1996	16319788648.9276
1997	17638707856.2198
1998	17735903273.381
1999	19561707882.9615
2000	20876106373.1764
2001	21676838385.487
2002	22360596843.4233
2003	17530210646.3654
2004	22002895104.6847
2005	22945464615.2945
2006	23600968591.498
2007	20051640596.2101
2008	21674578026.9483
2009	25376480223.5939
2010	25187175195.9834
2011	26060238681.5303
2012	26313963927.4918
2013	26122398541.3427
2014	26421330958.0769
2015	26798245744.3939
2016	24680854883.3297
2017	27049710631.8167
2018	25683323895.2133