Year	current US$
1970	0
1971	0
1972	0
1973	0
1974	0
1975	0
1976	0
1977	0
1978	0
1979	0
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	0
1989	0
1990	0
1991	0
1992	110713739.88094
1993	83428963.1051831
1994	21890940.6005108
1995	20469286.7016074
1996	20007083.2243801
1997	15943652.2143641
1998	13989820.5414822
1999	11761809.7113987
2000	28681687.7596073
2001	15866334.6116512
2002	250008263.839715
2003	261890104.291624
2004	602315393.829204
2005	586531011.436861
2006	1921463710.37973
2007	2045641615.64384
2008	1466787257.00741
2009	1199665420.74856
2010	2767297623.86656
2011	3637274030.57886
2012	4029473105.10329
2013	4004925405.77054
2014	3241867392.6998
2015	1419633068.23715
2016	2232241263.72341
2017	2904585610.94316
2018	3773958170.84787
2019	2947994851.08422
2020	4608868628.76258
2021	11248759356.2384