Year	US Dollars
1960	-400000.00596
1961	283290008.54492
1963	219999.99881
1965	12989999.77112
1966	30360000.61035
1967	185619995.11719
1968	59999.99866
1969	-1100000.02384
1970	-449999.98808
1971	-90000.00358
1972	680000.00715
1973	1019999.98093
1974	1710000.03815
1975	18030000.68665
1976	60290000.91553
1977	156779998.7793
1978	126160003.66211
1979	107550003.05176
1980	113849998.47412
1981	139080001.83105
1982	149750000
1983	197649993.89648
1984	260320007.32422
1985	245610000.61035
1986	282760009.76562
1987	242940002.44141
1988	266910003.66211
1989	289190002.44141
1990	396899993.89648
1991	403440002.44141
1992	461459991.45508
1993	435290008.54492
1994	642289978.02734
1995	547150024.41406
1996	606039978.02734
1997	510730010.98633
1998	484500000
1999	562469970.70312
2000	459929992.67578
2001	445799987.79297
2002	607000000
2003	638030029.29688
2004	1359160034.17969
2005	473089996.33789
2006	185630004.88281
2007	265220001.2207
2008	357429992.67578
2009	245509994.50684
2010	237419998.16895
2011	190899993.89648
2012	243419998.16895
2013	278130004.88281
2014	227809997.55859
2015	421410003.66211
2016	220179992.67578
2017	232750000
2018	163889999.38965
2019	20770000.45776
2020	111069999.69482
2021	217990005.49316