Year	US Dollars
1990	950464685.56787
1991	1661255327.88276
1992	413954029.00601
1993	453518444.07094
1994	-549721052.63158
1995	-1850527505.65185
1996	-3255234811.31102
1997	-2565129059.32754
1998	-180569495.55779
1999	-272815107.08955
2000	-1139614721.92354
2001	-846809707.72196
2002	-1046562772.99579
2003	-1196072175.54681
2004	968256562.30788
2005	3200764690.65925
2006	4259855901.1489
2007	4626657534.11157
2008	5100722247.93079
2009	7991187116.4035
2010	6415142748.68116
2011	8728906386.12484
2012	9959647554.59073
2013	12069389858.0778
2014	13226448271.709
2015	11207439402.4087
2016	14615557199.7995
2017	15559583054.0861