Year	current US$
1970	26910000.53286556
1971	28029999.792575814
1972	17849999.666214
1973	17189999.5803833
1974	28570000.171661336
1975	60250000.14901167
1976	44910001.5126168
1977	38300000.11064115
1978	67710001.08122815
1979	72789999.89852303
1980	82019999.92132185
1981	112920001.80482863
1982	87079999.08924106
1983	93339999.04990196
1984	90199999.31752682
1985	67730000.5406141
1986	87780000.98466879
1987	125750001.44541264
1988	202659995.5558777
1989	277840000.39100647
1990	261300003.86387107
1991	239709998.13079834
1992	429739997.14851344
1993	278069997.131825
1994	364660001.4567374
1995	364669998.6457823
1996	298000001.0281801
1997	183680000.11891142
1998	202840000.80823898
1999	86360001.31070612
2000	115169998.91400331
2001	244930003.73244298
2002	198869996.96493137
2003	214529998.12364578
2004	348559992.9690362
2005	472529994.3834542
2006	511129994.2135813
2007	583870001.1968613
2008	582320002.07901
2009	579709997.6539611
2010	733949997.9019166
2011	738859992.9809579
2012	874649996.5786941
2013	807039984.5540515
2014	777679990.0531776
2015	604900000.2592807
2016	712159996.6287609
2017	868290003.2997129
2018	794300001.3828278
2019	687999999.4039539
2020	836490012.2284887
2021	757210009.5842034
2022	612959999.0099676