Year	US Dollars
1990	-448878091.87279
1991	-139515306.12245
1992	22999410.72481
1993	-202589525.86207
1994	-345404157.04388
1995	-434120734.90814
1996	-457107769.42356
1997	-505672867.46988
1998	-531334098.9011
1999	-366666441.12478
2000	-538252609.85676
2001	-485249959.21343
2002	-760732745.09012
2003	-779366853.02353
2004	-1105959259.67153
2005	-1015508170.04405
2006	-1164260334.65979
2007	-1488850833.22528
2008	-2489389195.01191
2009	-2027568785.91221
2010	-1721658843.42181
2011	-1988026443.11204
2012	-2091926757.61062
2013	-1954141906.61554
2014	-1955699214.63657
2015	-1632710386.39036
2016	-1583676794.35582
2017	-1557197867.02765