Year	US Dollars
1976	12180000.30518
1977	11229999.54224
1978	9819999.69482
1979	8680000.30518
1980	5650000.09537
1981	5809999.94278
1982	5929999.82834
1983	4949999.80927
1984	5489999.77112
1985	13060000.41962
1986	13359999.65668
1987	8130000.11444
1988	6070000.17166
1989	9560000.41962
1990	19110000.61035
1991	86669998.16895
1992	124389999.38965
1993	124150001.52588
1994	180380004.88281
1995	143800003.05176
1996	175740005.49316
1997	226229995.72754
1998	214369995.11719
1999	209820007.32422
2000	222419998.16895
2001	247139999.38965
2002	244289993.28613
2003	258130004.88281
2004	247880004.88281
2005	215539993.28613
2006	199550003.05176
2007	217979995.72754
2008	231589996.33789
2009	311709991.45508
2010	287200012.20703
2011	315269989.01367
2012	428670013.42773
2013	424459991.45508
2014	306480010.98633
2015	257549987.79297
2016	339149993.89648
2017	808590026.85547
2018	332570007.32422
2019	317279998.7793
2020	701909973.14453
2021	266160003.66211