Year	US Dollars
1965	935312237.4685
1966	988518622.23467
1967	758891066.92803
1968	949313917.67012
1969	957714925.7911
1970	1026043125.17502
1971	1850322942.99354
1972	2133779264.21405
1973	2691503708.69858
1974	9248635743.51978
1975	6548276206.89655
1976	5958959986.32011
1977	4040474877.87858
1978	4754634678.2988
1979	12163531476.1216
1980	12615611542.7303
1981	7772597202.29555
1982	461965960.40292
1983	2040446312.17839
1984	3356974332.99561
1985	2343750664.89362
1986	-326909153.47557
1987	3448152852.5296
1988	956988530.46595
1989	2682096664.39755
1990	-2420138888.88889
1991	-11978544143.5104
1992	-2730061349.69325
1993	834437748.34437
1994	2117844781.14478
1995	2825067359.24933
1996	4124915831.66333
1997	4025717111.77053
1998	-1876640419.94751
1999	1957950065.70302
2000	9928292372.88136
2001	5500488425.17118
2002	3053635077.32806
2003	8439597315.43624
2004	14584323040.38
2005	28852739726.0274
2006	42019297036.52649
2007	40235749472.20269
2008	60189732142.8571
2009	31848505906.8798
2010	41919050942.0796
2011	72884057971.0145
2012	84340836012.86169
2013	76833568406.2059
2014	60133520730.8503
2015	10117314722.4992
2016	2000000000