Year	current US$
1977	959999.985992908
1979	0
1980	2899999.99478459
1981	1480000.00789762
1982	469999.993219972
1983	409999.98711049603
1984	489999.998360872
1985	659999.968484044
1986	1070000.02637506
1987	419999.986886978
1988	519999.99210238503
1989	639999.995008111
1990	1829999.9702721802
1991	2249999.97764826
1992	1909999.97407198
1993	3469999.9988079104
1994	4949999.9694526205
1995	3919999.97012317
1996	7409999.97407198
1997	9400000.005960459
1998	10060000.0526756
1999	7829999.955371019
2000	5350000.00521541
2001	9779999.97884035
2002	10299999.957904201
2003	9310000.02846122
2004	7889999.98569489
2005	7989999.97973442
2006	8370000.014081601
2007	8989999.92012978
2008	10809999.9725819
2009	9910000.01877546
2010	11489999.9499321
2011	10389999.9260902
2012	11023150.0882655
2013	10760307.9080582
2014	10671041.3098335
2015	10008602.7085781
2016	8409343.80888939
2017	8720026.07584
2018	10589880.0194263
2019	15716051.7573357
2020	19357490.0329113
2021	18414293.915033303
2022	17186069.846153267