Year	US Dollars
1990	5011511930.48423
1991	5465745847.46507
1992	5962845568.35626
1993	6400170078.62333
1994	6752156829.00506
1995	7204505924.01243
1996	7705365715.9709
1997	8330859676.90762
1998	8913222486.36726
1999	9294031433.37567
2000	10352987563.2253
2001	10965111641.252
2002	11366439016.4367
2003	11920034564.7806
2004	12991909034.8866
2005	13589086000.4
2006	15291040021.6902
2007	16923595555.3167
2008	17997464512.7653
2009	18401408754.07389
2010	19759588240.2074
2011	20798674896.4042
2012	21936951969.0716
2013	23007264384.8558
2014	23635434352.8811
2015	25177405234.437
2016	26521708326.8401
2017	28537473685.7547