Year	constant 2010 US$
1991	51096920923.6453
1992	52002278716.1617
1993	54278219443.3601
1994	54524771774.7952
1995	50527139233.6884
1996	49285519483.3548
1997	50295433518.773
1998	52708703407.2446
1999	56237203723.7559
2000	57999143279.8066
2001	60620741383.4642
2002	65391126897.5245
2003	70910841224.6876
2004	72407616584.5799
2005	74531632894.2463
2006	75749169294.8026
2007	76616417234.4338
2008	75685353244.5006
2009	70663094020.1095
2010	68770113772.527
2011	69259159007.7463
2012	67692359740.3148
2013	67850156357.1951
2014	69727360562.8112
2015	72472554754.8419
2016	75343830591.8655
2017	78966094290.214
2018	83210223621.8855