Year	constant 2010 US$
1968	76790666666.6668
1969	81427200000.0002
1970	129182079226.667
1971	155680187306.667
1972	191378651013.334
1973	237635882453.334
1974	276199588560.001
1975	251538792560.001
1976	296365455893.334
1977	317387724293.334
1978	300820954506.667
1979	336677102293.334
1980	355707632773.334
1981	362619047920.001
1982	287448524293.334
1983	241309051493.334
1984	230060546080
1985	207527260666.667
1986	242833346960
1987	226727434880
1988	256449843840
1989	255159860400
1990	293927384693.334
1991	338039654613.334
1992	351519121626.667
1993	346725309733.334
1994	348662534026.667
1995	349402017093.334
1996	358617230506.667
1997	362575583120
1998	373066209146.667
1999	359026663653.334
2000	379223407546.667
2001	374631983413.334
2002	364070454426.667
2003	404999478400
2004	437231125626.667
2005	461601733253.333
2006	474473046266.667
2007	483237181440
2008	513438407146.667
2009	502865333333.333
2010	528207200000
2011	581011322640
2012	612452430240
2013	628984081386.667
2014	651957609840
2015	678729654960
2016	690068800000
2017	684951733333.334
2018	700123200000