Year	US Dollars adjusted for inflation)
1990	6357857589.72256
1991	5613988348.08606
1992	3267341064.55077
1993	2979815090.27954
1994	3140725187.90155
1995	3357435176.13862
1996	3554362204.25115
1997	3672405405.76911
1998	3940490999.95859
1999	4070527203.11312
2000	4310688308.03981
2001	4722645335.98072
2002	5345387542.90141
2003	6095922452.64279
2004	6734033974.85163
2005	7667755681.51717
2006	8679746345.9219
2007	9873142200.51879
2008	10554389012.5207
2009	9060944166.21842
2010	9260284937.79782
2011	9695518329.74638
2012	10393595649.8063
2013	10736584306.437
2014	11123101341.572
2015	11479040584.7388
2016	11501998665.6524
2017	12364648565.4688