Year	US Dollars
1990	88946693907.76428
1991	85555881662.21948
1992	83465852892.93332
1993	84289466772.44077
1994	90164539905.86041
1995	96970821082.12039
1996	100445756552.68201
1997	110212886342.73997
1998	118970001541.793
1999	126660598344.61801
2000	137593825287.58496
2001	144136130619.90497
2002	149009200176.72998
2003	150193235318.452
2004	163894391675.884
2005	168542939523.63806
2006	182691118031.30899
2007	199996367063.36896
2008	212770179525.83298
2009	204522359140.59302
2010	210782608309.03699
2011	220207155805.57404
2012	221064507784.85297
2013	225363033587.85498
2014	228549068021.73697
2015	232584893728.17493
2016	240256347087.15103
2017	250207420223.41595