Year	US Dollars
1960	5515080078.125
1961	4627709960.9375
1962	4789390136.71875
1963	6884470214.84375
1964	8482440429.6875
1965	8835000000
1966	8389889648.4375
1967	8988540039.0625
1968	5941910156.25
1969	5520189941.40625
1970	4961109863.28125
1971	5689799804.6875
1972	3369419921.875
1973	3726969970.70313
1974	5275790039.0625
1975	6005500000
1976	6376859863.28125
1977	3361810058.59375
1978	3331260009.76563
1979	3514889892.57813
1980	5105310058.59375
1981	4831750000
1982	4112040039.0625
1983	4650029785.15625
1984	4404089843.75
1985	4161109863.28125
1986	4101520019.53125
1987	2958860107.42188
1988	3248790039.0625
1989	2894709960.9375
1990	2077889892.57813
1991	3723439941.40625
1992	3203590087.89063
1993	1965150024.41406
1994	2738389892.57813
1995	1932859985.35156
1996	2246159912.10938
1997	2098360107.42188
1998	2089010009.76563
1999	1801489990.23438
2000	1804239990.23438
2001	2407199951.17188
2002	2311530029.29688
2003	768989990.23438
2004	892010009.76562
2005	2053050048.82813
2006	1487469970.70313
2007	1285180053.71094
2008	1909209960.9375
2009	2417489990.23438
2010	2705139892.57813
2011	2972199951.17188
2012	1499869995.11719
2013	2353189941.40625
2014	2880620117.1875
2015	3473379882.8125
2016	2844820068.35938
2017	3403449951.17188
2018	2537320068.35938
2019	2635750000
2020	1794209960.9375
2021	3149969970.70313