Year	current US$
1975	13785312.213640528
1976	12005743.614811193
1977	12980150.809492126
1978	14840677.578116057
1979	16183657.500558909
1980	17790252.789797314
1981	21049184.095610205
1982	20318490.719139874
1983	18918918.91891892
1984	20886353.663887672
1985	19135414.484251693
1986	22459893.048128344
1987	26746954.208094105
1988	33752029.39417244
1989	32367898.291617006
1990	33970520.14199722
1991	40525991.053524606
1992	44938014.99517482
1993	47239161.84971099
1994	42211255.870322675
1995	43245259.26508774
1996	45107395.08076955
1997	43457222.00237435
1998	40716353.887399465
1999	44591018.02119985
2000	40225939.82462424
2001	33121704.151396103
2002	33091720.177099384
2003	38756476.87273628
2004	46707659.90957632
2005	46502188.82448388
2006	46090317.634936355
2007	49876614.47290761
2008	50782688.57233649
2009	48463919.5127962
2010	60307287.78122296
2011	70675803.20917962
2012	78345443.9470138
2013	77096597.99754639
2014	71943464.26236202
2015	73716313.0933131
2016	69885166.32056476
2017	77367754.14686932
2018	83467652.23923595
2019	100542361.12394902
2020	86349916.26074012
2021	76593288.16044496