Year	current US$
1975	7405812.279094122
1976	5942808.261028962
1977	6546019.0729651805
1978	10259127.8470871
1979	12560250.391236307
1980	15465725.347301299
1981	17618938.175132155
1982	18195557.358758494
1983	16370270.27027027
1984	15125054.848617814
1985	13970249.31908653
1986	15350935.828877006
1987	18353171.824674416
1988	22220798.085960865
1989	21488279.698053237
1990	20453773.730513968
1991	20300786.67283665
1992	21700690.37191003
1993	21896676.300578035
1994	41400166.641417965
1995	53617279.09355575
1996	56615959.08758828
1997	41421527.502967946
1998	38429021.44772118
1999	39565198.986319356
2000	40940535.37623184
2001	43867582.05740148
2002	45074463.49263439
2003	42169087.3712824
2004	47388061.70788232
2005	57971267.97041669
2006	61213095.65883986
2007	64278466.80375059
2008	71580571.09907848
2009	76927628.06504107
2010	109352022.6901704
2011	117061696.22451703
2012	164838471.3959026
2013	100310132.87206572
2014	93082566.12435545
2015	98558808.18109488
2016	99819395.68578908
2017	118926606.96133903
2018	106937601.8787629
2019	124822726.87658623
2020	112621837.48480074
2021	109026895.20899594