Year	US Dollars
1980	-21900000
1981	-19100000
1982	-17100000
1983	-19800000
1984	-10700000
1985	6100000
1986	10400000
1987	16300000
1988	12100000
1989	9900000
1990	6079204.18848
1991	-14500556.09756
1992	-15038628.193
1993	-40602718.9781
1994	-5247144.08973
2006	-269375000
2007	168193992.1875
2008	-107214250
2009	232165796.875
2010	314232523.4375
2011	146770406.73971
2012	338015500.54185
2013	509162220.02509
2014	545418181.10482
2015	375888479.75385
2016	-50665377.17841
2017	-220432279.1894