Year	US Dollars
1995	36692628850.2272
1996	39395430239.48249
1997	42830450914.1387
1998	43965468302.06049
1999	43474063224.5972
2000	46705367753.96371
2001	49310243990.5087
2002	53696579468.2701
2003	56377011464.8473
2004	61556336515.0649
2005	64624300286.29739
2006	73416282328.71878
2007	81606190438.85539
2008	87329477586.9064
2009	83365130323.73489
2010	82615902994.89149
2011	86398067904.48669
2012	87617813671.24838
2013	90801403401.34529
2014	91626929903.99361
2015	94901071086.83418
2016	95774140816.22969
2017	101924500399.14699