Year	current US$
1970	11659958.7832476
1971	18048369.2226889
1972	24453085.7429054
1973	25834745.7481295
1974	109471799.789642
1975	132239076.313552
1976	136132425.670131
1977	149768020.322962
1978	161183305.064043
1979	311636396.795249
1980	442942439.3673
1981	361004028.147794
1982	206849213.095586
1983	285056911.96195
1984	314249069.259242
1985	353699843.052327
1986	183435905.808902
1987	222141235.419976
1988	176198300.205831
1989	257590396.624629
1990	339521949.209355
1991	176849986.110441
1992	167919916.98254
1993	177251253.816707
1994	165690804.080912
1995	194317444.075226
1996	205747146.13343
1997	156721008.189775
1998	35061148.5708332
1999	82758158.2829666
2000	183095971.867472
2001	179100051.835567
2002	154582562.871857
2003	154923850.377679
2004	165670069.962232
2005	205417394.859535
2006	268277737.906457
2007	276599057.400122
2008	422123831.106572
2009	230570618.194403
2010	234443173.820897
2011	291297693.375183
2012	322414867.554346
2013	265698439.400269
2014	204761719.72129
2015	98347650.422927
2016	76033640.0544012
2017	107281596.874803
2018	193249755.340293
2019	151483037.521257
2020	70863431.0508698
2021	167693172.833866