Year	US Dollars
1962	1530526.44382
1963	3069183.56044
1964	3073129.87012
1965	5866666.66667
1966	8966666.66667
1967	7021583.66712
1968	9742857.14286
1969	10671428.57143
1970	-6230000
1971	-1964905.20952
1972	-6273435.91978
1973	-12351527.63474
1974	-15539029.59072
1975	-8167993.45028
1976	-5685843.68414
1977	-5887154.10337
1980	-117630191.62976
1981	-110995647.51124
1982	-123966893.31877
1983	-57694342.53643
1984	-76961161.35855
1985	-45599948.13728
1986	-81348788.74429
1987	-140930954.49939
1988	-163915320.9588
1989	-118045213.24367
1990	-140557259.69718
1991	-180584358.97881
1992	-129327210.36315
1993	-113212124.41191
1994	-58396173.1592
1995	-309129704.91341
1996	-801418098.32189
1997	-736847149.43083
1998	-1111479042.01665
1999	-1023818485.68562
2000	-941467298.98172
2001	-1495027988.57086
2002	-119228557.241
2003	-1721620988.83982
2004	-1092100649.49815
2005	3600053595.46862
2006	4651757606.42628
2007	5641596705.63452
2008	9827684040.36308
2009	3978209448.26226
2010	4375937101.86421
2011	7638755994.55015
2012	6075326853.36391
2013	6234626750.87037
2014	5987836129.56727
2015	1903073719.73431
2016	1140901225.42242
2017	2329645387.53667