Year	current US$
1970	0
1971	0
1972	0
1973	0
1974	0
1975	0
1976	0
1977	0
1978	0
1979	163724.215767045
1980	1204102.15714679
1981	756707.863345427
1982	602662.195812669
1983	1118348.92231345
1984	861032.712436156
1985	237361.836037318
1986	417912.591628235
1987	168834.956294437
1988	136088.086473785
1989	30814.3709103711
1990	22569.4862864952
1991	181869.267873303
1992	0
1993	0
1994	0
1995	1734841.18411492
1996	1801273.27766956
1997	1045007.20593435
1998	594762.13570557
1999	178962.448850098
2000	71360.3165806798
2001	55063.7927684752
2002	153485.15443492
2003	243311.033434436
2004	629241.883702378
2005	2147598.30643864
2006	9467521.36736025
2007	16764462.40114
2008	1465799.53491526
2009	1715076.37201566
2010	4787229.09193148
2011	10841684.8244302
2012	8800921.0664332
2013	1339693.14190529
2014	916666.856552187
2015	613995.464178826
2016	963569.079638473
2017	928725.011920059
2018	0
2019	0
2020	0
2021	0