Year	US Dollars
1960	221779998.7793
1961	85430000.30518
1962	51619998.93188
1963	107610000.61035
1964	152460006.71387
1965	200759994.50684
1966	261260009.76562
1967	103940002.44141
1968	234490005.49316
1969	61500000
1970	54060001.37329
1971	58529998.7793
1972	343209991.45508
1973	177750000
1974	882289978.02734
1975	1091060058.59375
1976	959150024.41406
1977	1012890014.64844
1978	1082890014.64844
1979	1778150024.41406
1980	1584989990.23438
1981	1561969970.70313
1982	1873329956.05469
1983	2412909912.10938
1984	1581030029.29688
1985	2829290039.0625
1986	1990290039.0625
1987	1612010009.76563
1988	1580959960.9375
1989	1287020019.53125
1990	1316239990.23438
1991	1283089965.82031
1992	741109985.35156
1993	647489990.23438
1994	566869995.11719
1995	295179992.67578
1996	281070007.32422
1997	200000000
1998	306359985.35156
1999	360410003.66211
2000	341339996.33789
2001	304000000
2002	444750000
2003	808239990.23438
2004	1206780029.29688
2005	2158129882.8125
2006	2310879882.8125
2007	2215310058.59375
2008	2598580078.125
2009	2489179931.64063
2010	2076679931.64063
2011	1721780029.29688
2012	1342270019.53125
2013	1535400024.41406
2014	853099975.58594
2015	1023780029.29688
2016	862109985.35156
2017	906969970.70312
2018	976340026.85547
2019	1576560058.59375
2020	2348199951.17188
2021	3560110107.42188