Year	US Dollars
1960	657530029.29688
1961	676059997.55859
1962	590140014.64844
1963	580969970.70312
1964	530400024.41406
1965	476510009.76562
1966	510959991.45508
1967	355260009.76562
1968	295339996.33789
1969	311970001.2207
1970	507630004.88281
1971	355829986.57227
1972	553179992.67578
1973	958099975.58594
1974	1312819946.28906
1975	1843250000
1976	2066439941.40625
1977	1468140014.64844
1978	1385849975.58594
1979	3751770019.53125
1980	3722719970.70313
1981	3039330078.125
1982	2234899902.34375
1983	2119750000
1984	1770689941.40625
1985	1538119995.11719
1986	1291500000
1987	1167729980.46875
1988	803479980.46875
1989	575469970.70312
1990	1407689941.40625
1991	1265430053.71094
1992	564679992.67578
1993	441339996.33789
1994	470760009.76562
1995	628359985.35156
1996	618330017.08984
1997	617979980.46875
1998	582250000
1999	599729980.46875
2000	783960021.97266
2001	671789978.02734
2002	822530029.29688
2003	1777719970.70313
2004	778609985.35156
2005	871789978.02734
2006	694830017.08984
2007	706109985.35156
2008	803859985.35156
2009	821979980.46875
2010	1035239990.23438
2011	1034839965.82031
2012	1217099975.58594
2013	1412300048.82813
2014	2738459960.9375
2015	2312439941.40625
2016	2934330078.125
2017	3141159912.10938
2018	2562489990.23438
2019	2752310058.59375
2020	3114040039.0625
2021	3269860107.42188