Year	US Dollars
1990	299351733.70074
1991	307102705.99289
1992	321903649.99893
1993	337399585.56004
1994	342519102.47995
1995	353389998.81375
1996	361612317.72583
1997	377567001.61536
1998	404520675.96642
1999	397848931.15284
2000	398646995.15255
2001	430029602.33885
2002	424562667.2874
2003	469132697.49014
2004	491349733.80597
2005	512797948.6423
2006	567200819.17572
2007	614075769.52533
2008	675300339.79875
2009	680945770.31365
2010	700179483.77046
2011	711578991.43619
2012	717962326.76542
2013	710887008.43689
2014	760492719.44991
2015	749319274.17706
2016	781074348.20005
2017	752071477.2899