Year	current US$
1970	3200000.021606683
1971	3759999.966248869
1972	6269999.871030456
1973	9489999.948069453
1974	9499999.944120647
1975	10510000.001639128
1976	13699999.971315261
1977	19579999.955371033
1978	36520000.075921424
1979	37529999.772086725
1980	52229999.85329805
1981	48669999.77082017
1982	59569999.78423119
1983	78500000.67055228
1984	86960000.7459521
1985	95949999.6602535
1986	148149999.12120402
1987	164369998.2333928
1988	183950000.75362623
1989	171499998.4819442
1990	219069998.98701924
1991	257019999.09058198
1992	228599998.96958458
1993	180239998.45236543
1994	215740001.3804436
1995	236010001.54390937
1996	206470000.50544727
1997	161460001.37180087
1998	152900000.0804662
1999	165750000.07636836
2000	150540000.9825826
2001	144320001.5984476
2002	178999999.4896352
2003	248760000.44867384
2004	256989997.70171964
2005	261819999.486208
2006	245010001.2607873
2007	325250002.2612511
2008	270620000.5710126
2009	449710002.5415418
2010	354280000.89153665
2011	477709994.2266939
2012	439019999.1762639
2013	463059999.2722274
2014	490780002.0538271
2015	508940005.2390992
2016	462030006.59868133
2017	459439999.06256795
2018	469110000.97170466
2019	486930000.8546559
2020	533030003.6277621
2021	594210004.3650718
2022	534000000.0186266