Year	current US$
1970	3640000.1235306226
1971	1940000.025555492
1972	3269999.952986839
1973	4419999.990612274
1974	4720000.104978685
1975	15599999.567493789
1976	19130000.50559642
1977	8129999.857395884
1978	8410000.009462237
1979	5160000.009462231
1980	7469999.933615327
1981	8100000.029429792
1982	12270000.115036963
1983	11360000.018030401
1984	20849999.874830246
1985	16939999.91752208
1986	24779999.403282996
1987	24070000.404491983
1988	21400000.007823117
1989	18920000.236481436
1990	25839999.709278353
1991	45179999.9065697
1992	49539999.82029201
1993	29280000.64939262
1994	37090000.109747045
1995	36669999.91238119
1996	30829999.694600698
1997	19800000.29318033
1998	25020000.100135803
1999	17470000.00625849
2000	17299999.527633183
2001	13969999.819993977
2002	19750000.024214383
2003	26759999.517351396
2004	33329999.126493946
2005	93299997.27010731
2006	78260000.64238906
2007	61220001.028850615
2008	34270000.10758635
2009	44870000.45180324
2010	50390000.14215709
2011	51610001.05738629
2012	53429999.84882778
2013	57099999.84875325
2014	56499999.59766863
2015	60030000.83565719
2016	55519999.30664898
2017	69719998.91288577
2018	58190000.39435923
2019	50289999.87617139
2020	55629999.58358705
2021	59130000.42550267
2022	62049998.7434596