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	908874.66938795
1985	1614133.79555072
1986	3751679.11460895
1987	4245518.19505846
1988	4634933.96239495
1989	2504038.98941851
1990	1627960.05759919
1991	4969851.26947109
1992	366983.827349691
1993	0
1994	1840827.4385865
1995	1434213.42333685
1996	2438152.09745298
1997	1864169.23067005
1998	1527359.08848695
1999	795472.068116645
2000	832885.241583892
2001	292478.987205052
2002	984728.824437275
2003	369125.329529487
2004	979063.236795203
2005	1951073.91516506
2006	6110796.53184102
2007	11216.0782198849
2008	30003119.3824106
2009	96546576.4258922
2010	312878294.633451
2011	650268900.28262
2012	491559378.097273
2013	373203297.899554
2014	297552140.577445
2015	221154844.037234
2016	358424663.075598
2017	444398309.456977
2018	461849696.481523
2019	443621071.955948
2020	576712809.960899
2021	2362718420.708