Year	US Dollars
1960	130979995.72754
1961	115150001.52588
1962	173750000
1963	22629999.16077
1964	34569999.69482
1965	29530000.68665
1966	140649993.89648
1967	40020000.45776
1968	34500000
1969	70589996.33789
1970	143380004.88281
1971	130289993.28613
1972	294970001.2207
1973	1991219970.70313
1974	3256780029.29688
1975	3073030029.29688
1976	2848739990.23438
1977	3421139892.57813
1978	2661050048.82813
1979	5275160156.25
1980	4500660156.25
1981	4392879882.8125
1982	2859929931.64063
1983	2205560058.59375
1984	1632790039.0625
1985	1537089965.82031
1986	1498430053.71094
1987	1395310058.59375
1988	266709991.45508
1989	196729995.72754
1990	1328750000
1991	742830017.08984
1992	266010009.76562
1993	327339996.33789
1994	839450012.20703
1995	376670013.42773
1996	260079986.57227
1997	247520004.27246
1998	202580001.83105
1999	262399993.89648
2000	203020004.27246
2001	258010009.76562
2002	87440002.44141
2003	152570007.32422
2004	125839996.33789
2005	83419998.16895
2006	19610000.61035
2007	76029998.7793
2008	146149993.89648
2009	203699996.94824
2010	133580001.83106
2011	262149993.89648
2012	1230310058.59375
2013	2926610107.42188
2014	3251620117.1875
2015	4271529785.15625
2016	7547970214.84375
2017	9093849609.375
2018	9354500000
2019	9687349609.375
2020	10038929687.5
2021	8246910156.25