Year	current US$
1972	19999.9995529652
1973	79999.9982118607
1974	449999.988079071
1975	59999.9986588955
1976	730000.019073486
1977	230000.004172325
1978	889999.985694885
1979	1690000.0572204601
1980	6940000.05722046
1981	2289999.96185303
1982	1679999.94754791
1983	2970000.02861023
1984	5639999.8664856
1985	3599999.90463257
1986	1870000.00476837
1987	3450000.04768372
1988	5699999.80926514
1989	6969999.79019165
1990	19819999.6948242
1991	1110000.01430511
1992	6869999.88555908
1993	6989999.771118159
1994	7789999.96185303
1995	20680000.3051758
1996	10579999.923706101
1997	14329999.923706101
1998	17420000.0762939
1999	14439999.5803833
2000	8720000.26702881
2001	10109999.6566772
2002	8850000.38146973
2003	6449999.80926514
2004	16110000.610351602
2005	16319999.6948242
2006	1070000.05245209
2007	409999.99642372096
2008	1149999.97615814
2009	750000
2010	289999.99165535
2011	90000.0035762787
2012	29999.999329447703
2016	150000.005960464
2017	59999.9986588955
2018	280000.001192093
2019	150000.005960464
2020	19999.9995529652