Year	US Dollars
1960	-322404731.90536
1961	-317830323.39353
1962	-259762004.7599
1963	-245780624.38751
1964	-344889402.21196
1965	-300993980.1204
1966	-267954640.90718
1967	-329553408.93182
1968	-302113957.72085
1969	-267954640.90718
1970	-352092958.14084
1971	-256637168.14159
1972	-101557285.87319
1973	86138613.86139
1974	2636248415.7161
1975	-1248062953.99516
1976	-2071954314.72081
1977	846673819.74249
1978	-1537689969.60486
1979	2719273127.7533
1980	6535122222.22222
1981	-2393152302.24321
1982	-1069492337.16475
1983	721492354.74006
1984	2223628710.67789
1985	2561221044.36592
1986	604094052.55878
1987	2948297093.64908
1988	2419669655.49788
1989	6680744590.58125
1990	5431169980.33646
1991	5074686589.52801
1992	4098546152.79111
1993	1507830242.82561
1994	1141538829.38026
1995	3355738345.65094
1996	2374332000
1997	2396228986.93616
1998	-2173178977.27273
1999	4265996376.36035
2000	14880720628.7679
2001	4009183296.42825
2002	5053156789.53576
2003	2947693898.27151
2004	10430214993.0769
2005	14104659861.0695
2006	31432237117.7373
2007	4983771235.71534
2008	30779610952.7103
2009	-450179480.82527
2010	29070483306.4978
2011	40620607559.8923
2012	85264283451.22849
2013	26010706294.2753
2014	34024993346.0568
2015	-156940.57291
2016	-9251573052.19141