Year	US Dollars
1960	192728268.8
1961	-868829320.53333
1962	85108690.48889
1963	-582725723.02222
1964	-160858112
1965	1257542633.24444
1966	1634697944.17778
1967	252505110.75556
1968	1610311270.4
1969	2714323444.62222
1970	2454150060.55556
1971	6099709613.98458
1972	6834642808.63205
1973	-231313287.6975
1974	-3967665540.38671
1975	-316462113.12808
1976	3911996799.55488
1977	10673368053.3313
1978	16145734415.7551
1979	-10178503567.126
1980	-10762068405.8626
1981	7475430292.95017
1982	6219369374.97566
1983	19079060105.2496
1984	32245787241.20871
1985	44628940393.8528
1986	76372034621.45099
1987	70119436522.3403
1988	60316016096.5481
1989	41283113614.81661
1990	24334823972.23609
1991	53701857442.874
1992	80300794385.84518
1993	95400268710.3522
1994	93372521470.96408
1995	68882921041.5524
1996	20960827953.1638
1997	46662186990.92249
1998	73268232837.02028
1999	70920261125.7625
2000	69858164254.79402
2001	28406411972.79
2002	55588254059.3996
2003	75374244717.87711
2004	97348257280.97009
2005	71777619304.25282
2006	64060574741.2065
2007	85462427868.38609
2008	22622980954.8227
2009	28821172575.4274
2010	83250289431.37589
2011	-33435655229.4631
2012	-95940046462.8555
2013	-119443838032.60799
2014	-119570779007.336
2015	-18394959911.6325
2016	48093211944.4155