Year	current US$
1970	38220000.836998194
1971	40540000.090375505
1972	39730000.12524427
1973	40010000.02771619
1974	45840000.230819
1975	44729999.82349576
1976	35229999.53664839
1977	48850000.85458155
1978	63810000.34138558
1979	62420001.16594131
1980	63410000.58501957
1981	52920000.82321466
1982	35760000.236332476
1983	32789999.85381957
1984	26819999.910891023
1985	18829999.934881926
1986	42720000.112429276
1987	43619999.7980147
1988	41999998.947605535
1989	21890000.941231824
1990	46090000.46737502
1991	48900000.45672061
1992	47339999.41684304
1993	46509999.69430268
1994	25999999.72432852
1995	37779999.69944357
1996	23469999.739900224
1997	30910000.119358294
1998	30269999.338313922
1999	28949999.837204807
2000	30470000.44956806
2001	22829999.836161714
2002	15290000.135079084
2003	18140000.259503737
2004	21349999.56563115
2005	3500000.197440396
2006	18139999.840408552
2007	20839999.91789461
2008	18899999.827146523
2009	34680000.07793304
2010	15740000.298246745
2011	26259999.617934205
2012	32300000.16838309
2013	22900000.2481043
2014	21030000.39793549
2015	21529999.97697775
2016	24759999.76508324
2017	26839999.66830018
2018	28470000.48495833
2019	37279999.32132656
2020	37619999.33421607
2021	39699999.98062849
2022	24320000.79192226