Year	current US$
1970	29969999.656081185
1971	34629999.7270107
1972	35049999.80330464
1973	37639999.926090255
1974	36910000.09514393
1975	53410000.056028396
1976	49290000.17046929
1977	49649999.20129776
1978	60519999.62329866
1979	68289999.87244603
1980	85169999.6590614
1981	114670000.1955033
1982	107840000.15258786
1983	93459999.56130975
1984	100949999.57084656
1985	107190000.05722046
1986	128270000.2193451
1987	134989999.77111807
1988	156060000.5388261
1989	152009999.1559983
1990	126939999.10354617
1991	142649999.67813492
1992	122370001.25646597
1993	94389999.18103218
1994	69289999.563247
1995	66530000.75556338
1996	85489999.60720539
1997	107010000.54180622
1998	87850000.26226047
1999	64780000.29921535
2000	50909999.899566166
2001	50260001.07824804
2002	58759999.15599826
2003	63749999.71687791
2004	77759999.09639357
2005	75880000.88930129
2006	93800000.60796739
2007	97799999.5946884
2008	110640000.34332274
2009	124239999.80092056
2010	119010000.94413753
2011	91149999.40991405
2012	87225227.53477095
2013	81741423.90489581
2014	91864296.85354236
2015	84746532.14216235
2016	89592228.23381425
2017	77867060.21428105
2018	74307902.12005375
2019	100757262.05110551