Year	constant 2010 US$
1976	4302606931.14795
1977	4628059214.85624
1978	5592383064.28745
1979	6112695353.90449
1980	7254421860.17312
1981	7694152083.51726
1982	8249960775.00649
1983	8314347493.22621
1984	8804742726.43434
1985	9054726417.43075
1986	9625712694.82438
1987	9764161717.16086
1988	9363649196.25032
1989	8059770743.64316
1990	8172170730.61317
1991	8081716275.8347
1992	9795699318.29631
1993	10367837413.3039
1994	10922209594.9877
1995	11736910926.9582
1996	11968572510.1205
1997	12567643520.2012
1998	13109590099.5741
1999	13531822696.4252
2000	14598195984.8256
2001	15467397257.3115
2002	16172293568.6652
2003	16936696441.3143
2004	18515203104.0404
2005	20020979710.2713
2006	21722169643.185
2007	23710483185.9103
2008	25110089219.334
2009	26409232120.599
2010	26336530324.4006
2011	27000685579.801
2012	27620192725.7148
2013	28471988946.2092
2014	29312679481.1262
2015	30003014837.0988
2016	30722728481.6803
2017	31455754542.1876
2018	32080109358.1462