Year	current US$
1968	620000.004768372
1969	899999.976158142
1970	1159999.9666214
1971	1470000.02861023
1972	1509999.9904632599
1973	1700000.04768372
1974	2980000.01907349
1975	3809999.94277954
1976	2039999.96185303
1977	2539999.96185303
1978	1899999.97615814
1979	4300000.19073486
1980	3980000.01907349
1981	1710000.03814697
1982	3480000.01907349
1983	3119999.8855590797
1984	1690000.0572204601
1985	2859999.89509583
1986	3240000.00953674
1987	2670000.07629395
1988	3160000.08583069
1989	2150000.09536743
1990	1299999.95231628
1991	2099999.90463257
1992	2700000.04768372
1993	2180000.0667572
1994	2009999.9904632599
1995	1679999.94754791
1996	939999.997615814
1997	1529999.97138977
1998	970000.028610229
1999	1009999.99046326
2000	800000.011920929
2001	870000.004768372
2002	589999.973773956
2003	560000.002384186
2004	810000.002384186
2005	990000.009536743
2006	1129999.99523163
2007	800000.011920929
2008	800000.011920929
2009	1240000.0095367401
2010	639999.985694885
2011	490000.009536743
2012	534833.72926712
2013	619786.977767944
2014	457994.997501373
2015	422695.30892372096
2016	441676.586866379
2017	984460.592269897
2018	371605.24725914
2019	617179.989814758
2020	433444.857597351
2021	627367.436885834
2022	755638.539791107