Year	US Dollars
1973	230000.00417
1974	9109999.65668
1975	10319999.69482
1976	9170000.07629
1977	11329999.92371
1978	7869999.88556
1979	7469999.79019
1980	9199999.80927
1981	15609999.65668
1982	15180000.30518
1983	19270000.45776
1984	63250000
1985	76860000.61035
1986	50080001.83105
1987	36020000.45776
1988	34810001.37329
1989	24920000.07629
1990	20530000.68665
1991	22879999.16077
1992	17770000.45776
1993	11079999.92371
1994	32689998.62671
1995	12069999.69482
1996	13899999.61853
1997	11359999.65668
1998	8289999.96185
1999	13829999.92371
2000	21819999.69482
2001	15810000.41962
2002	14310000.41962
2003	12090000.15259
2004	17530000.68665
2005	59259998.32153
2006	29799999.23706
2007	26440000.53406
2008	30469999.31335
2009	45189998.62671
2010	32669998.16895
2011	9710000.03815
2012	7239999.77112
2013	12000000
2014	37930000.30518
2015	25799999.23706
2016	9010000.22888
2017	6159999.84741
2018	31989999.77112
2019	15090000.15259
2020	69559997.55859
2021	64510002.13623