Year	current US$
1970	1299999.95231628
1971	3120000.1239776597
1972	7639999.8664856
1973	13720000.2670288
1974	14730000.4959106
1975	27200000.762939498
1976	28459999.084472697
1977	26870000.8392334
1978	22860000.6103516
1979	42360000.6103516
1980	65349998.474121094
1981	78330001.8310547
1982	86139999.3896484
1983	92660003.6621094
1984	107980003.35693401
1985	127650001.52587901
1986	187600006.10351598
1987	262700012.207031
1988	379610015.86914104
1989	435309997.558594
1990	514630004.882813
1991	687140014.648438
1992	443730010.986328
1993	264929992.675781
1994	245639999.38964802
1995	261890014.648438
1996	251709991.455078
1997	250509994.506836
1998	258929992.675781
1999	278769989.013672
2000	247800003.05175802
2001	253180007.93457
2002	279470001.220703
2003	343779998.779297
2004	437839996.33789104
2005	596369995.117188
2006	454580017.089844
2007	583900024.414063
2008	692760009.765625
2009	790890014.648438
2010	838419982.910156
2011	838809997.558594
2012	794760009.765625
2013	822169982.910156
2014	937530029.296875
2015	697830017.089844
2016	638440002.441406
2017	597959960.9375
2018	475910003.66210896
2019	601580017.089844
2020	655020019.53125
2021	702169982.910156
2022	301639998.9165365