Year	constant 2010 US$
1971	7269450773.70259
1972	7657530413.66734
1973	8099505595.9113
1974	8004725728.20643
1975	8323250424.35635
1976	9333575629.21726
1977	10812858174.4125
1978	11153302711.0052
1979	11140321702.7164
1980	11241332951.8872
1981	9223474728.3699
1982	8128402030.18328
1983	9762344031.16836
1984	11159356561.7848
1985	11611153853.4858
1986	13113969773.8898
1987	12773077694.94
1988	13061708559.2438
1989	13445860698.7888
1990	14091364601.5405
1991	14307125414.8718
1992	15857247179.572
1993	17126128087.3909
1994	18373802419.9748
1995	18954392290.7984
1996	19042041928.4223
1997	20541918275.1673
1998	22102680801.7139
1999	22028657697.6913
2000	22484861313.0558
2001	23265969816.1775
2002	23657931083.0166
2003	24345023423.7394
2004	25038464099.4649
2005	25805620385.1092
2006	27583531619.0929
2007	29741857002.6408
2008	30954832266.3072
2009	30880104285.6364
2010	33413635221.7453
2011	34437486200.0027
2012	36303367215.5227
2013	37025871863.2193
2014	38324887399.1696
2015	40671282116.622
2016	42890277019.496
2017	43129205938.9824