Year	current US$
1972	219999.998807907
1973	259999.990463257
1974	119999.997317791
1975	9999.99977648258
1976	1110000.01430511
1977	2000000
1978	180000.00715255702
1979	370000.00476837205
1980	2049999.9523162802
1981	2420000.07629395
1982	189999.99761581398
1983	620000.004768372
1984	3079999.92370605
1985	4230000.01907349
1986	2279999.97138977
1987	2730000.01907349
1988	18100000.3814697
1989	14609999.6566772
1990	12439999.5803833
1991	15800000.1907349
1992	10590000.1525879
1993	4260000.228881841
1994	5030000.20980835
1995	4710000.03814697
1996	1039999.96185303
1997	810000.002384186
1998	699999.988079071
1999	620000.004768372
2000	629999.995231628
2001	500000
2002	610000.014305115
2003	709999.978542328
2004	670000.016689301
2005	980000.019073486
2006	810000.002384186
2007	1169999.95708466
2008	1389999.98569489
2009	1220000.02861023
2010	1629999.99523163
2011	819999.992847443
2012	769999.980926514
2013	839999.973773956
2014	910000.026226044
2015	779999.971389771
2016	449999.988079071
2017	959999.978542328
2018	2869999.8855590797
2019	980000.019073486
2020	870000.004768372
2021	560000.002384186
2022	509999.99046325695