Year	US Dollars
1980	-9781526.38669
1981	-2334159.58828
1982	-2484198.81923
1983	-14008262.05092
1984	-6187644.86546
1985	-25171646.29546
1986	-35666255.74358
1987	-37251135.64985
1988	-36542623.48457
1989	-36848727.18498
1990	-40961899.8804
1991	-28581661.89112
1992	-18960773.24679
1993	-17371135.29252
1994	-18323955.15657
1995	-20426184.76331
1996	-17552967.71364
1997	4436005.86865
1998	-26647322.91646
1999	-44160371.87682
2000	-23931422.7427
2001	-30589247.31183
2002	-18584997.08689
2003	-15770624.57238
2004	-27399588.51418
2005	-37154746.4525
2006	-30739112.51546
2007	-36129347.1629
2008	-75729615.47039
2009	-43722737.6973
2010	-42835413.36019
2011	-44562821.61906
2012	-13687761.4357
2013	-27839331.51757
2014	-6809399.64995