Year	current US$
1979	15681960.11
1980	9399999.619
1981	9899999.619
1982	6199999.809
1983	12500000
1984	13899999.62
1985	10899999.62
1986	3599999.905
1987	3200000.048
1988	3299999.952
1989	3500000
1990	3400000
1991	3700000
1992	3900000
1993	3900000
1994	4600000
1995	4799400
1996	5000000
1997	5400000
1998	5600000
1999	5900000
2000	6089512.9065472
2001	6399200
2009	0
2010	0
2012	7990000
2013	4840000
2014	8942031.67182118
2015	2607106387.33774
2016	1548909687.62726
2017	1112210000
2018	956248076.150446
2019	667262506.260227
2020	727201189.577844
2021	812831957.035108
2022	952668903.843794