Year	constant 2010 US$
1976	1552886894.33188
1977	2171202098.25582
1978	2161471641.91839
1979	2496517672.29534
1980	3166069488.61669
1981	4021602570.62865
1982	3468347453.23664
1983	2812123382.274
1984	2906979887.35642
1985	2063403044.51769
1986	2153979384.34824
1987	2572212458.36846
1988	2890371004.98738
1989	2968047797.68096
1990	2791702203.29
1991	2288618047.9826
1992	3343833224.64302
1993	4067149960.9667
1994	4212331870.20803
1995	4067739566.29749
1996	4025797944.15343
1997	3690029972.78594
1998	3140857879.88035
1999	3610531974.92576
2000	3337035350.75212
2001	3210217209.80276
2002	3288639866.86702
2003	3587775389.51594
2004	4497733252.86346
2005	5911226787.46507
2006	5353834742.27443
2007	6220724464.81814
2008	7441427049.56197
2009	7781877801.06768
2010	7308039492.2426
2011	6566708979.46269
2012	5841397897.31258
2013	5521159923.64966
2014	5605205649.38047
2015	5865784497.11927
2016	5395731686.86818
2017	5800967433.04481
2018	5266402218.05297