Year	current US$
1970	10030000.105500218
1971	10250000.167638054
1972	14839999.912306655
1973	22799999.535083793
1974	15019999.746233234
1975	16330000.124871735
1976	12230000.162497146
1977	34309999.91111456
1978	57889999.82178211
1979	85150000.92610714
1980	105689999.88585715
1981	117850000.1206995
1982	81609999.74422151
1983	77149999.43971634
1984	90879999.6655434
1985	79519999.3867427
1986	111350001.49905677
1987	158859999.31581312
1988	150690000.36641955
1989	149470001.33991247
1990	240360004.18663025
1991	241699996.4956194
1992	239900001.6134234
1993	193609998.89299268
1994	288590001.44340116
1995	336739997.25468457
1996	367480000.7790328
1997	453120004.8774482
1998	380430002.72661453
1999	352170002.19970936
2000	340299998.5441567
2001	333320002.0454824
2002	266619998.71022993
2003	293099998.673424
2004	420760002.56650156
2005	219800000.4440547
2006	310450000.1892446
2007	468600001.4394522
2008	663720002.4127961
2009	682370003.0148032
2010	684089996.7104199
2011	588939996.3505566
2012	517609997.816384
2013	595090001.5123188
2014	468969998.8830834
2015	379359997.33954686
2016	429459998.74547106
2017	483529998.83890176
2018	529889999.92608964
2019	407180000.3796815
2020	590839996.8445299
2021	380940005.2670389
2022	239529999.0214407