Year	US Dollars
1960	56319999.69482
1961	572979980.46875
1962	264130004.88281
1963	38279998.7793
1964	-105860000.61035
1965	333809997.55859
1966	228399993.89648
1967	263230010.98633
1968	180190002.44141
1969	129770004.27246
1970	205039993.28613
1971	112139999.38965
1972	121540000.91553
1973	63560001.37329
1974	97260002.13623
1975	82440002.44141
1976	75190002.44141
1977	59400001.52588
1978	45669998.16895
1979	168330001.83105
1980	152690002.44141
1981	268709991.45508
1982	371970001.2207
1983	364700012.20703
1984	232619995.11719
1985	364209991.45508
1986	514340026.85547
1987	311350006.10352
1988	292179992.67578
1989	190110000.61035
1990	265920013.42773
1991	410929992.67578
1992	439239990.23438
1993	627890014.64844
1994	553599975.58594
1995	381410003.66211
1996	320730010.98633
1997	143800003.05176
1998	61939998.62671
1999	78220001.2207
2000	-12739999.77112
2001	155039993.28613
2002	196559997.55859
2003	152270004.27246
2004	164899993.89648
2005	250020004.27246
2006	296660003.66211
2007	128570007.32422
2008	166289993.28613
2009	215990005.49316
2010	490140014.64844
2011	980219970.70312
2012	441489990.23438
2013	566590026.85547
2014	795659973.14453
2015	338869995.11719
2016	883200012.20703
2017	801179992.67578
2018	558000000
2019	540030029.29688
2020	793729980.46875
2021	536799987.79297