Year	US Dollars
1990	5475890224.35351
1991	5686941512.35225
1992	5642849663.01538
1993	5842356066.94957
1994	6139898400.80355
1995	6293227396.15363
1996	6592232192.47993
1997	7169295578.41738
1998	7708452419.99328
1999	8038027657.36461
2000	8060868714.07593
2001	8788963767.63562
2002	9390431859.41103
2003	9380680644.23137
2004	10028786935.5596
2005	10526296722.7951
2006	11029474048.0704
2007	12071856633.6815
2008	10807260433.594
2009	10698112638.3977
2010	10239348449.4215
2011	11022605832.7629
2012	11766282593.5493
2013	13631427233.6515
2014	14240759323.4076
2015	15344038674.8712
2016	16621758717.4609
2017	18182386775.2282