Year	current US$
1970	4570881.89154632
1971	4968382.8253214
1972	5377293.50790093
1973	6656418.06340355
1974	8374236.17705739
1975	8977343.40840371
1976	7692123.44875393
1977	10995794.5524052
1978	14050494.2572383
1979	18619373.7844448
1980	24032080.1218343
1981	26170918.4497163
1982	19608740.7367836
1983	22665286.9783796
1984	17733880.193075
1985	23609410.4772725
1986	17918191.1466423
1987	22021867.1869497
1988	25989536.7124674
1989	27440237.3207828
1990	31387328.5479979
1991	69865678.4799938
1992	77110348.5059333
1993	84929123.1338227
1994	85836812.4724655
1995	92364630.2284826
1996	103342501.159692
1997	101296291.917594
1998	108817612.968409
1999	104459056.609484
2000	99434737.4807483
2001	87321012.774303
2002	77536165.0138591
2003	66765523.3941372
2004	125968149.550685
2005	133138715.254784
2006	144851753.429009
2007	178889786.3594
2008	235377566.9368
2009	226709931.039265
2010	250394382.115275
2011	259281749.590263
2012	266504005.630828
2013	253142328.848613
2014	221978209.20285
2015	250209021.014643
2016	276336131.69137
2017	270265237.154053
2018	276433989.89586
2019	306561858.053421
2020	295987242.582909
2021	321319745.837635