Year	US Dollars
1976	-48492105.06623
1977	-87630348.25118
1978	-125257573.0534
1979	-142356652.55782
1980	-116080840.1546
1981	-119509875.23079
1982	-30351805.01265
1983	-3929541.61043
1984	-34854314.76127
1985	-20398251.57844
1986	97427671.83509
1987	38670000.4659
1988	-105896098.29063
1989	-159870949.1272
1990	-191004810.44169
1991	-106949138.46527
1992	-104541482.47147
1993	-197076155.93835
1994	-310906215.8972
1995	-97950685.3097
1996	-30365331.14926
1997	-204394675.48071
1998	-34677214.31936
1999	-149369883.02933
2000	-25600390.10118
2001	268698526.91276
2002	144750016.6878
2003	72397541.35082
2004	-151462807.0622
2005	-377235033.66535
2006	-715180032.86226
2007	-745041307.79818
2008	-1333541865.82691
2009	-828478275.83402
2010	-1098575902.08027
2011	-1457151814.95158
2012	-1390415973.3777
2013	-1593217247.42194
2014	-1429775060.74144
2015	-1174725516.0925
2016	-1133000768.1075
2017	-1732499260.47086