Year	US Dollars
1973	419999.98689
1974	17489999.77112
1975	31979999.54224
1976	17750000
1977	18870000.83923
1978	24200000.76294
1979	25559999.46594
1980	42229999.54224
1981	36970001.2207
1982	41150001.52588
1983	25479999.54224
1984	38959999.08447
1985	42919998.16895
1986	25649999.61853
1987	29200000.76294
1988	30719999.31335
1989	39990001.67847
1990	28889999.38965
1991	25579999.92371
1992	17270000.45776
1993	13270000.45776
1994	26040000.91553
1995	28299999.23706
1996	54299999.23706
1997	18120000.83923
1998	26840000.15259
1999	11920000.07629
2000	20139999.38965
2001	28850000.38147
2002	39869998.93188
2003	13420000.07629
2004	32330001.83105
2005	23879999.16077
2006	21559999.46594
2007	19209999.08447
2008	19729999.54224
2009	34250000
2010	31360000.61035
2011	21750000
2012	24639999.38965
2013	18739999.77112
2014	15180000.30518
2015	12460000.03815
2016	9229999.54224
2017	20170000.07629
2018	27110000.61035
2019	52799999.23706
2020	64239997.86377
2021	74849998.47412