Year	current US$
1970	28839999.96259809
1971	35669999.815523624
1972	43529999.98256561
1973	43360000.083222985
1974	38039999.946951866
1975	58110000.431537636
1976	52359999.77588655
1977	46519999.9511242
1978	53270000.20816923
1979	68710001.11103058
1980	84779999.28593636
1981	119610001.95145603
1982	92480000.436306
1983	75580000.46014781
1984	62519999.9809265
1985	62079999.65548515
1986	71589999.95887284
1987	63459999.6805191
1988	78329999.26805496
1989	89339999.97377396
1990	67310000.02101061
1991	62800000.78491862
1992	58029999.546706714
1993	51939999.55058096
1994	46619999.86320731
1995	36660000.044852495
1996	34540000.24870038
1997	59229999.69869849
1998	51969999.72872434
1999	23030000.846833065
2000	31940000.005066406
2001	22460000.246763233
2002	22959999.81090427
2003	25580000.4787743
2004	39050000.25033956
2005	34889999.9856949
2006	34740000.27589501
2007	35480000.019073494
2008	44690000.325441346
2009	43739999.890327446
2010	46139999.732375145
2011	33950000.49471855
2012	30392221.823334698
2013	35774840.116500854
2014	31654465.153813384
2015	30634241.10412598
2016	23026266.17252826
2017	23548098.348081104
2018	23366197.139024723
2019	30095111.027359977
2020	30889823.436737087
2021	35543379.57501406
2022	49465364.87340927