Year	current US$
1975	8969498.625474539
1976	5907857.753879995
1977	6895320.470170769
1978	12266224.104383655
1979	13921305.611446457
1980	16007743.110908678
1981	18399218.570443578
1982	19379247.38817324
1983	17861261.26126126
1984	15379552.435278632
1985	15846078.636776311
1986	16456550.802139038
1987	18108808.29015544
1988	24709903.443561483
1989	21742550.655542314
1990	21001697.79286927
1991	22127872.89834953
1992	24298864.226857692
1993	25057803.468208093
1994	40375700.65141645
1995	54844598.316153914
1996	58006169.33192629
1997	38028333.992876925
1998	39486058.98123325
1999	39066003.60007001
2000	42031005.86965235
2001	44418727.39432975
2002	45712001.09368183
2003	42808120.595544346
2004	48117786.40398924
2005	58849274.218304604
2006	62112737.753309004
2007	65224056.332908235
2008	72746212.55963416
2009	78085082.30817693
2010	111169859.5239564
2011	147426308.24259287
2012	171599804.5939306
2013	106092320.04420418
2014	97493523.44114263
2015	107507331.01609066
2016	101892399.51207525
2017	124460591.45279196
2018	117170605.6749434
2019	129996769.2495944
2020	118918839.36390194
2021	103049499.21309619