Year	US Dollars
1960	-11439256.26574
1961	-15515635.33916
1962	-20022490.10109
1963	-23286441.83864
1964	-29817991.53209
1965	-17981129.11895
1966	-17530807.18173
1967	-17103460.00213
1968	-16997089.67439
1969	-21186281.47266
1970	-27170046.5515
1971	-25822267.92716
1972	-28211524.94901
1973	-50296951.8145
1974	-54895339.29555
1975	-98979167.68533
1976	-89205205.7284
1977	-121770572.15469
1978	-128600161.6351
1979	-169317995.00182
1980	-123141840.43474
1981	-66304007.6182
1982	-57845649.75217
1983	-59290086.39999
1984	-55469971.73344
1985	-200626220.2341
1986	-234726698.17541
1987	-244124530.18606
1988	-223651230.3617
1989	-252719367.58203
1990	-250821790.11499
1991	-233633766.49065
1992	-258247222.24111
1993	-234126623.36057
1994	-221539911.31559
1995	-171175546.19027
1996	-185214652.49699
1997	-188844918.03065
1998	-193248736.5917
1999	-212884183.19923
2000	-246415408.77133
2001	-598106484.17511
2002	-2006920633.66353
2003	-933558532.57474
2004	10998700.89013
2005	671831682.14343
2006	-55246139.2939
2007	369388178.56776
2008	527880695.91852
2009	-632268231.83985
2010	-714012714.09736
2011	-355763892.12957
2012	-450137337.0777
2013	-714538307.22209
2014	-1156073209.75294
2015	-718127245.01416
2016	-1080420135.84298
2017	-581491393.32335