Year	current US$
1974	59999.998658895405
1975	149999.99850988397
1976	429999.995976687
1977	830000.0131130214
1978	2350000.0275671505
1979	3739999.9257177105
1980	5729999.873787165
1981	6300000.12367963
1982	7489999.897778033
1983	8200000.017881398
1984	8039999.9246001225
1985	10440000.150352713
1986	12719999.944791202
1987	14279999.645426854
1988	14000000.027939688
1989	11290000.099688768
1990	13930000.036954883
1991	14350000.230595466
1992	18209999.889135372
1993	25299999.95417894
1994	35789999.48687852
1995	55679999.86559151
1996	67169999.69072637
1997	80160000.77128418
1998	82149998.90141198
1999	83430000.51192935
2000	98240000.01698741
2001	123549999.83496962
2002	181039999.25777304
2003	225980004.92900604
2004	270639997.8864938
2005	288189998.4385817
2006	362320004.0534137
2007	464969996.8472123
2008	526690001.9310415
2009	412379998.84225434
2010	381619999.9768287
2011	385090001.385659
2012	334609997.74932843
2013	325400003.2339245
2014	309400002.23368406
2015	256739999.08380213
2016	238780000.03285703
2017	248179997.43111432
2018	252979999.87751228
2019	251910000.62040982
2020	253930000.8770077
2021	276140002.17802817
2022	275769999.58045775