Year	US Dollars
1960	-33615427.69145
1961	-12725325.49349
1962	-14821923.56153
1963	1055578.88842
1964	-49568948.62103
1965	-34859302.81394
1966	17359652.80694
1967	-8699254.34963
1968	-56762270.49082
1969	-79803192.12769
1970	-58802352.09408
1971	-109630163.30452
1972	-155439739.41368
1973	-182624113.47518
1974	-242987570.1243
1975	-296007039.9296
1976	-262347376.52624
1977	44989550.1045
1978	85190688.45963
1979	-20002266.54578
1980	729763.10767
1981	-256708207.02818
1982	-349163635.34299
1983	-265345150.60553
1984	-143172339.45419
1985	-206508905.11999
1986	81437785.24225
1987	10990176.24437
1988	-159075046.45994
1989	-387006963.06096
1990	-175139212.13809
1991	-48207774.14075
1992	-33375363.20139
1993	287893269.6137
1994	-15590267.34755
1995	-333493635.07779
1996	-532295302.01342
1997	-653787665.44635
1998	-666793997.27149
1999	-545127551.02041
2000	-1072214484.67967
2001	-1257335069.44444
2002	-1582365059.74454
2003	-1402744691.8695
2004	-1444489729.37724
2005	-2234320000
2006	-2438554948.39101
2007	-2793990732.69621
2008	-4061286341.19583
2009	-2158074358.6846
2010	-2407656214.23667
2011	-3334528625.89865
2012	-3209049147.67062
2013	-3158435013.18321
2014	-3090039617.97277
2015	-2311638562.29726
2016	-1907262480.51481
2017	-2062891856.72589