Year	US Dollars
1960	-711539688000
1961	-36289432.72876
1962	-38617092.58825
1963	-39756808.83272
1964	-35778431.85509
1965	-28437030.55037
1966	-28622659.94894
1967	-40562454.0398
1968	-41820425.45663
1969	-51250579.60729
1970	-48987516.05897
1971	-69561880.89327
1972	-86148673.00248
1973	-112064689.56984
1974	-121324251.80076
1975	-214340678.51259
1976	-183620150.03951
1977	-254333379.73523
1978	-299284005.10867
1979	-367815867.31202
1980	-430335835.70578
1981	-393503705.86542
1982	-411038234.82332
1983	-347100437.45703
1984	-259813131.327
1985	-327647798.20457
1986	-406865697.63899
1987	-396291293.07089
1988	-422027051.69949
1989	-389645134.82725
1990	-418342896.82063
1991	-404456618.39537
1992	-239283920.32274
1993	-273359090.34749
1994	-205183819.80265
1995	-296639252.97567
1996	-441086758.46306
1997	-386520208.4468
1998	-429811443.54699
1999	-438572567.09677
2000	-406093969.14446
2001	-390491086.07529
2002	-401325302.20741
2003	-559865505.91939
2004	-700220789.99812
2005	-876640691.63614
2006	-803087913.50228
2007	-969994368.48001
2008	-1370607130.06459
2009	-1257230728.04754
2010	-935115097.20823
2011	-873648265.89577
2012	-1299954498.00804
2013	-1784389927.94106
2014	-1114660760.69699
2015	-1066983740.79275
2016	-564153140.39595
2017	-764571707.06447