Year	current US$
1975	32506741.720120434
1976	30036416.961994376
1977	34139387.8908849
1978	41567471.67219869
1979	44667002.01207244
1980	53260077.431109086
1981	62242013.330268905
1982	62068161.071102545
1983	60863963.963963956
1984	64248354.54146556
1985	60058663.31447727
1986	68195855.61497326
1987	81667133.45469822
1988	106657267.36734171
1989	106344854.98609458
1990	113563821.57740392
1991	132201141.44686103
1992	137066290.55007052
1993	138489884.3930636
1994	195990986.21420997
1995	208871665.74868202
1996	222100576.3454826
1997	214991452.314998
1998	191504892.7613941
1999	199208717.50191283
2000	204848487.80648512
2001	181117230.40654567
2002	182764280.8285007
2003	202246591.2155022
2004	230657627.23132342
2005	261803684.24175352
2006	292230662.3990124
2007	298519024.14082026
2008	344436582.0757636
2009	312377678.8394101
2010	366832215.1895781
2011	414533117.6922989
2012	470705196.4326592
2013	450650633.0413497
2014	439877614.41920644
2015	437003078.563584
2016	420548712.43328804
2017	460374354.8472466
2018	488906838.5948662
2019	512053692.0786754
2020	484796854.9187562
2021	469228219.6657909
2022	500274898.08522147