Year	US Dollars
1960	19270000.45776
1961	28610000.61035
1962	50950000.76294
1963	39520000.45776
1964	11109999.65668
1965	17520000.45776
1966	20469999.31335
1967	47419998.16895
1968	48369998.93188
1969	57150001.52588
1970	45720001.2207
1971	34799999.23706
1972	24139999.38965
1973	26750000
1974	31489999.77112
1975	36189998.62671
1976	49639999.38965
1977	35779998.7793
1978	58310001.37329
1979	58599998.47412
1980	32540000.91553
1981	26309999.46594
1982	29709999.08447
1983	35599998.47412
1984	35310001.37329
1985	50220001.2207
1986	50860000.61035
1987	46060001.37329
1988	45229999.54224
1989	50500000
1990	49000000
1991	34240001.67847
1992	38380001.06812
1993	47240001.67847
1994	46869998.93188
1995	25229999.54224
1996	28690000.53406
1997	18889999.38965
1998	20010000.22888
1999	61930000.30518
2000	24530000.68665
2001	33970001.2207
2002	32240001.67847
2003	16170000.07629
2004	7789999.96185
2005	12909999.84741
2006	8489999.77112
2007	22000000
2008	22389999.38965
2009	26110000.61035
2010	23239999.77112
2011	19620000.83923
2012	25569999.69482
2013	50720001.2207
2014	35709999.08447
2015	30469999.31335
2016	37759998.32153
2017	36119998.93188
2018	34110000.61035
2019	36500000
2020	69300003.05176
2021	73050003.05176