Year	current US$
1970	11016021495.7786
1971	7796195119.40441
1972	10189401611.2086
1973	12463949705.1426
1974	17079641737.3032
1975	21314188072.2719
1976	28036762499.2322
1977	27239977910.6012
1978	28964196005.0633
1979	28698223053.5364
1980	43701932531.3541
1981	141870040833.08
1982	125797372631.735
1983	84399172317.791
1984	62551961485.9008
1985	61275580867.2896
1986	46532841552.9565
1987	42856657869.9372
1988	42497310294.7895
1989	32716337817.8157
1990	39377951445.6481
1991	38346262719.17
1992	36245524761.187
1993	18501778265.052
1994	25140128692.0661
1995	34135241239.9801
1996	39854311852.2361
1997	43297726359.528
1998	45405677439.0672
1999	50524864261.8854
2000	50245326395.4967
2001	57912213005.6127
2002	77787088830.0566
2003	83563378741.7589
2004	106282911592.429
2005	134261779797.002
2006	199188708486.115
2007	227234605874.289
2008	275013402711.797
2009	247409404891.413
2010	293431576478.3
2011	323487212414.446
2012	371531355255.71
2013	423720250266.34
2014	483590240570.028
2015	427297983711.111
2016	354205619259.166
2017	321488689032.274
2018	348408553490.782
2019	375139240375.531
2020	363360574592.209
2021	363312013594.576