Year	current US$
1970	0
1971	2390000.0248104297
1972	3899999.92586672
1973	6469999.98576939
1974	10200000.1035631
1975	19060000.4289299
1976	23559999.9707192
1977	20329999.8883158
1978	18330000.076442998
1979	29029999.7664988
1980	45459999.2725998
1981	49820000.117644705
1982	56490001.058206
1983	61640000.8033961
1984	76789999.5911866
1985	79560001.7104298
1986	111080000.862479
1987	145019999.12224698
1988	225210001.315922
1989	238260001.00374198
1990	231829999.00355902
1991	253940000.84884498
1992	200000001.70432
1993	94890000.3544986
1994	88090000.3015995
1995	85179999.6756017
1996	73079999.8547882
1997	64370000.006631
1998	70709999.5277822
1999	65229999.9706447
2000	67140000.4737079
2001	65419999.551028
2002	70429999.76873401
2003	78799999.9858439
2004	84620000.7479638
2005	124649998.903275
2006	147860001.545399
2007	184340002.102777
2008	187980000.976473
2009	223010002.143681
2010	240369999.77380002
2011	235159999.942407
2012	179750001.942739
2013	228980000.196025
2014	278400000.495836
2015	157600001.312792
2016	136500000.135973
2017	115319999.23847601
2018	107340001.672506
2019	93200000.0067055
2020	110930000.07420799
2021	107759999.496862
2022	147399999.8066574