Year	US Dollars
1977	-7185185.18519
1978	-10000000
1979	-27888888.88889
1980	-41703703.7037
1981	-29222222.22222
1982	-20407407.40741
1983	-15518518.51852
1984	-29444444.44444
1985	-23077777.77778
1986	-6600000
1987	-10244444.44444
1988	-20329629.62963
1989	-47955555.55556
1990	-43229629.62963
1991	-34003703.7037
1992	-25544444.44444
1993	-24959259.25926
1994	-29600000
1995	-32700000
1996	-23700000
1997	-35703703.7037
1998	-20581481.48148
1999	-23777777.77778
2000	-38566666.66667
2001	-44500370.37037
2002	-33066888.88889
2003	-38925814.81481
2004	-43633296.2963
2005	-67037037.03704
2006	-54444444.44444
2007	-88487518.51852
2008	-130588407.40741
2009	-116516703.7037
2010	-88873111.11111
2011	-76534111.11111
2012	-91515555.55556
2013	-50195814.81481
2014	-61998074.07407
2015	-46792444.44444
2016	-32779037.03704
2017	-67500000