Year	current US$
1970	0
1971	0
1972	0
1973	0
1974	0
1975	0
1976	69999.9984353781
1977	139999.996870756
1978	89999.9979883432
1979	29999.999329447703
1980	9999.99977648258
1981	29999.999329447703
1982	9999.99977648258
1983	9999.99977648258
1984	59999.9986588955
1985	9999.99977648258
1986	29999.999329447703
1987	0
1988	49999.998882412896
1989	0
1990	39999.9991059303
1991	219999.998807907
1992	39999.9991059303
1993	19999.9995529652
1994	19999.9995529652
1995	109999.999403954
1996	169999.999925494
1997	149999.99664723902
1998	49999.998882412896
1999	139999.996870756
2000	179999.99783933198
2001	170000.00178813902
2002	3160000.03926456
2003	10300000.352785
2004	3490000.05610287
2005	4049999.9467283497
2006	4109999.9118596297
2007	4730000.06377697
2008	2930000.0295043
2009	1560000.01728535
2010	1550000.02682209
2011	4059999.9409169005
2012	3370000.07368624
2013	3780000.12785196
2014	7189999.94546175
2015	4659999.97220933
2016	4870000.110939151
2017	9199999.94337559
2018	6149999.96311963
2019	7920000.11913478
2020	9690000.07025898
2021	7640000.09186566
2022	3429999.9866634607