Year	constant 2010 US$
1971	57875014014.0605
1972	60572871328.7122
1973	65344258344.3462
1974	69452857315.471
1975	67739116222.7756
1976	67749725982.8305
1977	65177645284.0326
1978	65150059425.9551
1979	67082282227.6666
1980	67979218142.7486
1981	71074103290.1007
1982	71510258563.2656
1983	73259697516.1415
1984	75926254226.6678
1985	76799549516.0166
1986	79077450807.4156
1987	79534305260.6178
1988	79871049165.9213
1989	79954932092.8068
1990	80367248492.5567
1991	77535997640.5736
1992	78578872883.2084
1993	82968064042.1009
1994	87549309069.9826
1995	92191895589.3498
1996	94417260664.3716
1997	97686847325.9931
1998	99909532434.6055
1999	103897426025.813
2000	107278701147.981
2001	111613062342.389
2002	116887298802.679
2003	122469844435.909
2004	126240224569.745
2005	129347147605.79
2006	132738722802.175
2007	135836080348.33
2008	134404848504.074
2009	138539066202.416
2010	139300334408.93
2011	143158450397.631
2012	146979276242.197
2013	150943517027.213
2014	156407665805.23
2015	163183152960.634
2016	169367568218.989
2017	173653749711.169