Year	current US$
1970	16859365.4628975
1971	15505904.9196765
1972	18417461.8483349
1973	29928878.2750993
1974	34550031.7070142
1975	44724782.9223172
1976	42269804.2304764
1977	69152908.6609737
1978	73568432.2037405
1979	78362559.0595049
1980	96108743.4171455
1981	84112335.2405718
1982	113012372.512015
1983	77313403.9278386
1984	70826481.072816
1985	54811635.7744662
1986	85249188.5494839
1987	85527018.9197634
1988	90745295.258849
1989	94355044.8997553
1990	121770886.049926
1991	121022267.861881
1992	127196355.893282
1993	116657356.658685
1994	135088539.935506
1995	193185888.901478
1996	192549929.228682
1997	181337201.816972
1998	191590233.742721
1999	137893659.77532
2000	138974028.007638
2001	123434220.060458
2002	134990312.923473
2003	185002786.213216
2004	140579901.195636
2005	134563602.881436
2006	161386922.913956
2007	255522731.790095
2008	353992301.821978
2009	384885890.447194
2010	380734878.925709
2011	436537512.877706
2012	503996465.429139
2013	528367412.236493
2014	576535349.065745
2015	595239529.232098
2016	615846145.18326
2017	605174097.823102
2018	435368311.898298
2019	403916718.492723
2020	431053973.778686
2021	451240446.153567