Year	US Dollars
1960	141089996.33789
1961	172570007.32422
1962	188110000.61035
1963	174850006.10352
1964	112459999.08447
1965	143199996.94824
1966	165350006.10352
1967	177350006.10352
1968	277820007.32422
1969	231360000.61035
1970	256010009.76562
1971	259769989.01367
1972	244130004.88281
1973	309529998.7793
1974	508200012.20703
1975	489700012.20703
1976	511920013.42773
1977	366179992.67578
1978	400519989.01367
1979	485149993.89648
1980	488540008.54492
1981	614309997.55859
1982	509089996.33789
1983	874690002.44141
1984	991429992.67578
1985	1901109985.35156
1986	1372699951.17188
1987	1151800048.82813
1988	1678859985.35156
1989	1243819946.28906
1990	1510640014.64844
1991	1609579956.05469
1992	1617930053.71094
1993	1562949951.17188
1994	1495619995.11719
1995	1123630004.88281
1996	1049339965.82031
1997	808179992.67578
1998	943890014.64844
1999	913500000
2000	1033489990.23438
2001	1675380004.88281
2002	1930729980.46875
2003	2122540039.0625
2004	2185879882.8125
2005	2277469970.70313
2006	2263550048.82813
2007	2655169921.875
2008	3329120117.1875
2009	3939850097.65625
2010	3572209960.9375
2011	3399540039.0625
2012	3212090087.89063
2013	3791459960.9375
2014	3453010009.76563
2015	3410300048.82813
2016	4376410156.25
2017	4346399902.34375
2018	4987330078.125
2019	4798509765.625
2020	5304729980.46875
2021	3761830078.125