Year	US Dollars
1960	1330000.04292
1961	18219999.31335
1962	69709999.08447
1963	155820007.32422
1964	92889999.38965
1965	155399993.89648
1966	89269996.64307
1967	47790000.91553
1968	35619998.93188
1969	84900001.52588
1970	70330001.83105
1971	55229999.54224
1972	25159999.84741
1973	57599998.47412
1974	82790000.91553
1975	92069999.69482
1976	37409999.84741
1977	73040000.91553
1978	178009994.50684
1979	144660003.66211
1980	210399993.89648
1981	268640014.64844
1982	290369995.11719
1983	174220001.2207
1984	320149993.89648
1985	295640014.64844
1986	356429992.67578
1987	387369995.11719
1988	419070007.32422
1989	622340026.85547
1990	431459991.45508
1991	550039978.02734
1992	606760009.76562
1993	572159973.14453
1994	487390014.64844
1995	498750000
1996	380440002.44141
1997	530789978.02734
1998	494119995.11719
1999	332059997.55859
2000	224190002.44141
2001	437739990.23438
2002	371119995.11719
2003	320269989.01367
2004	322730010.98633
2005	224649993.89648
2006	195330001.83105
2007	263739990.23438
2008	340869995.11719
2009	212059997.55859
2010	220059997.55859
2011	190050003.05176
2012	612520019.53125
2013	447899993.89648
2014	536159973.14453
2015	581400024.41406
2016	608940002.44141
2017	497809997.55859
2018	659080017.08984
2019	577650024.41406
2020	725630004.88281
2021	556059997.55859