Year	US Dollars
1990	294157318.56654
1991	308261190.1864
1992	432169658.07274
1993	482412502.49281
1994	482280995.01697
1995	525242335.97142
1996	863545343.07666
1997	2384560110.16686
1998	2668725986.64437
1999	3640683616.41992
2000	3395388356.45272
2001	3531708818.08831
2002	4842611714.44784
2003	4604975402.41094
2004	5896206889.2973
2005	10742850685.1668
2006	18485580424.4826
2007	22220986984.7212
2008	24740573446.4181
2009	22544952330.9096
2010	18450447612.6514
2011	22107638610.3946
2012	24989008735.33829
2013	25097531248.4557
2014	25512398064.08089
2015	26011945494.91761
2016	24774145192.1977
2017	24571140921.2191