Year	US Dollars
1960	-155568262.65796
1961	-311297264.55396
1962	-135767512.54038
1963	-156482138.23834
1964	-137353803.14786
1965	-162395804.53133
1966	-147927517.07855
1967	-86227315.78592
1968	-227118061.05351
1969	-215936032.72835
1970	-404932357.04324
1971	-494562544.16961
1972	-399902891.03039
1973	-808484055.60098
1974	-2073644041.04183
1975	-1851218039.21569
1976	-2113939655.17241
1977	-2499744892.61393
1978	-2256760948.90511
1979	-2220644262.29508
1980	-3725847817.38086
1981	-4769732573.2899
1982	-4394807013.11806
1983	-2676639341.29569
1984	-1526865790.19447
1985	-822546181.90375
1986	-787237635.70567
1987	-2361108154.26213
1988	-4467003481.89415
1989	-3599419404.12529
1990	-5288719729.99578
1991	-6489970584.15429
1992	-7952505197.5052
1993	-6628163321.28164
1994	-6890157125.60386
1995	-7532110919.46398
1996	-8724629581.49207
1997	-9359578044.59691
1998	-11365420747.9964
1999	-13191982740.2514
2000	-13068761746.8214
2001	-12417217897.0917
2002	-11100643704.122
2003	-11440018058.6907
2004	-15615920039.7318
2005	-17961212535.7543
2006	-17183625642.9557
2007	-18352766219.5456
2008	-25448239343.782
2009	-16869288691.3031
2010	-18011797793.1771
2011	-10484481710.754
2012	-1098761442.2727
2013	2272056214.99946
2014	433982567.06976
2015	1161149663.60921
2016	2298618644.069
2017	2240511356.84525