Year	current US$
1971	2760000.0277161584
1972	6249999.9422579985
1973	12430000.165477388
1974	12160000.072792174
1975	21720000.41790308
1976	26769999.843090776
1977	23499999.878928065
1978	20630000.105127696
1979	33539999.85195694
1980	54199999.26537271
1981	64259999.91036943
1982	70490000.74341893
1983	81920000.86978084
1984	94719999.8628347
1985	110500002.24262473
1986	153790001.04404974
1987	209639999.09907573
1988	320760001.25519913
1989	342919999.6162207
1990	381949999.8893586
1991	498429997.0492721
1992	298060000.2165883
1993	181370000.7665903
1994	165280000.4743041
1995	178000000.2495945
1996	173689998.62112105
1997	156500000.25704506
1998	170089999.08901748
1999	181759999.24726784
2000	157960000.02138314
2001	161790000.54672372
2002	169970000.23722637
2003	212259999.77812165
2004	281959999.45700175
2005	418979999.04491055
2006	303890001.5614925
2007	359080001.30020094
2008	404720001.216978
2009	437990003.5299361
2010	458849997.9078768
2011	443359999.0755318
2012	404900004.6681614
2013	448519999.17626375
2014	541219998.2088059
2015	359500001.11944985
2016	301970001.01208717
2017	270349998.7851829
2018	235110001.2473762
2019	261069999.72835177
2020	290359999.5970726
2021	289479998.7357111
2022	293649999.1454184