Year	US Dollars
1960	168690002.44141
1961	881070007.32422
1962	382190002.44141
1963	183669998.16895
1964	32209999.08447
1965	163899993.89648
1966	99110000.61035
1967	274239990.23438
1968	73480003.35693
1969	110919998.16894
1970	162889999.38965
1971	67209999.08447
1972	56159999.84741
1973	-15100000.38147
1974	39529998.7793
1975	5630000.11444
1976	-18309999.46594
1977	121410003.66211
1978	645429992.67578
1979	11470000.26703
1980	65449996.94824
1981	15800000.19073
1982	3369999.88556
1983	121879997.25342
1984	27120000.83923
1985	36419998.16895
1986	56279998.7793
1987	126599998.47412
1988	136509994.50684
1989	158169998.16895
1990	174339996.33789
1991	276480010.98633
1992	159050003.05176
1993	200009994.50684
1994	177169998.16895
1995	196240005.49316
1996	173389999.38965
1997	250830001.83105
1998	213169998.16895
1999	208240005.49316
2000	177539993.28613
2001	165710006.71387
2002	166410003.66211
2003	165429992.67578
2004	211800003.05176
2005	113599998.47412
2006	127169998.16894
2007	100000000
2008	88730003.35693
2009	85430000.30518
2010	104610000.61035
2011	97209999.08447
2012	140949996.94824
2013	120069999.69482
2014	69379997.25342
2015	121440002.44141
2016	126940002.44141
2017	147800003.05176
2018	166570007.32422
2019	210500000
2020	235119995.11719
2021	289339996.33789