Year	current US$
1971	129999.995231628
1972	239999.994635582
1973	1629999.99523163
1974	230000.004172325
1975	2210000.03814697
1976	670000.016689301
1977	500000
1978	1659999.9666214
1979	5280000.20980835
1980	1590000.0333786
1981	419999.986886978
1982	19999.9995529652
1983	1409999.9666214
1984	280000.001192093
1985	4739999.771118159
1987	289999.99165535
1988	259999.990463257
1989	109999.999403954
1990	90000.0035762787
1991	7400000.09536743
1992	1190000.0572204601
1993	4000000
1994	7519999.98092651
1995	13180000.3051758
1996	14619999.8855591
1997	18950000.762939498
1998	14609999.6566772
1999	9050000.19073486
2000	19520000.4577637
2001	22930000.3051758
2002	23610000.6103516
2003	21389999.3896484
2004	32200000.7629395
2005	35869998.9318848
2006	32849998.4741211
2007	44639999.3896484
2008	48150001.5258789
2009	51360000.6103516
2010	39110000.6103516
2011	36229999.5422363
2012	31739999.7711182
2013	16700000.7629395
2014	-4639999.8664856
2015	-680000.007152557
2016	0
2017	0
2018	-170000.00178813902
2020	409999.99642372096
2021	409999.99642372096
2022	860000.014305115