Year	constant 2010 US$
1976	314075062.528205
1977	314075062.528205
1978	314409897.570441
1979	327133622.495105
1980	215298791.871535
1981	262510499.425342
1982	313405392.443736
1983	272642207.120937
1984	274690610.911129
1985	305621468.06141
1986	338395888.622864
1987	325875240.486627
1988	310141039.703509
1989	287315367.674457
1990	314905623.512555
1991	309923600.340199
1992	329300323.800321
1993	309953725.005979
1994	292047084.567961
1995	313837799.471426
1996	331698656.696905
1997	343754181.195928
1998	341122352.913365
1999	254157469.70379
2000	338593717.934351
2001	367308300.241575
2002	302909759.549362
2003	312210424.991452
2004	341822263.859532
2005	327490422.821065
2006	330553351.287418
2007	323159230.649827
2008	331830067.674762
2009	365679649.01297
2010	364307896.20717
2011	377016938.652818
2012	381188720.5557
2013	383087559.522618
2014	397135264.685491
2015	398147493.886408
2016	412708287.468693
2017	411905752.250317
2018	406458196.099027