Year	current US$
1970	6181320.26273365
1971	2839891.09154427
1972	12548699.8682172
1973	26161536.6379571
1974	394235931.239641
1975	329502651.36021
1976	311450170.220011
1977	344547591.933479
1978	266977580.372706
1979	806372327.267808
1980	753500193.217499
1981	386088609.343677
1982	134848331.617087
1983	412953913.735168
1984	528762175.680517
1985	708748436.224056
1986	353298204.01315
1987	941474830.523411
1988	1025367915.63831
1989	1797835880.13897
1990	2686321891.93121
1991	1568860434.93866
1992	2017934446.78296
1993	1672362829.91068
1994	1396998887.02773
1995	1789590060.36857
1996	2275898951.47336
1997	2206720470.88492
1998	1094438770.96934
1999	1722089522.75042
2000	3599511047.24875
2001	2517928972.14995
2002	3046934251.16934
2003	3018711098.33489
2004	5053921640.59529
2005	11055647473.5341
2006	15412233357.6561
2007	22726628413.0784
2008	36424293611.966
2009	16318304215.2064
2010	24128732095.7986
2011	32393126618.4241
2012	33370882868.7396
2013	30154273429.8245
2014	23495703769.3643
2015	8606543979.9894
2016	7583833616.38546
2017	13498656263.9374
2018	18660491598.9005
2019	14774903025.4551
2020	7656249842.95642
2021	13987115478.1654