Year	current US$
1970	0
1971	0
1972	0
1973	0
1974	0
1975	0
1976	0
1977	0
1978	0
1979	0
1980	486964.689812622
1981	589018.7054161
1982	1148484.91911083
1983	0
1984	42413.6317976275
1985	1461766.1880227
1986	1925088.24301781
1987	3160082.10062784
1988	3132740.50759305
1989	3627725.46799527
1990	6040774.0271281
1991	4431851.97590112
1992	1301102.04187815
1993	136847.140716586
1994	999046.195745018
1995	0
1996	3159967.22839275
1997	3595515.54413067
1998	3566202.593165
1999	3499458.90844124
2000	3295751.26564304
2001	4768701.38684602
2002	4089714.57023876
2003	5908868.87569943
2004	7331546.59163792
2005	9209118.65719949
2006	10442322.5547424
2007	8583678.71248228
2008	5831401.97617099
2009	1834588.45870346
2010	0
2011	0
2012	0
2013	0
2014	0
2015	0
2016	718402.819534475
2017	3598998.42013139
2018	5349301.55486859
2019	6781947.21828507
2020	10784932.835217
2021	8779779.86639752