Year	current US$
1970	18842654.6151238
1971	19648850.0547893
1972	23610644.5102331
1973	38442529.6888293
1974	42644248.2337856
1975	63490856.0226465
1976	71577426.9046693
1977	84823930.0663504
1978	87855513.5630781
1979	124729160.318857
1980	143444428.417278
1981	115354903.706988
1982	178203904.60009
1983	88880242.9642561
1984	52226412.7843209
1985	46580619.2373943
1986	57397378.3214186
1987	64970064.772486
1988	56607485.209714
1989	53033653.8883981
1990	98197465.7503212
1991	107155979.09959
1992	110354138.453674
1993	113687157.032333
1994	127020328.559353
1995	149719254.821824
1996	124307172.392554
1997	136242450.165934
1998	138971629.886671
1999	115916727.086484
2000	106779342.388736
2001	100601440.504255
2002	101660714.426574
2003	101933187.779181
2004	113469382.072749
2005	120565377.853665
2006	176488763.601039
2007	208256979.710918
2008	219619498.549587
2009	185880310.578767
2010	342464480.45453
2011	319003830.390805
2012	306946231.429473
2013	365703009.668997
2014	433070990.528637
2015	346833672.036888
2016	430566978.709564
2017	374626855.875617
2018	286368627.540773
2019	273009045.509195
2020	270990650.73083
2021	265103875.984735