Year	current US$
1970	30059999.87944961
1971	35049999.88153575
1972	34270000.366494074
1973	38399999.8923391
1974	39120000.04388392
1975	57410000.601783395
1976	55680000.619962834
1977	46819999.87363815
1978	59969999.82744456
1979	74240000.57578087
1980	107209998.99506581
1981	167180001.70588496
1982	130150001.01923943
1983	101890001.2075901
1984	92279999.77767463
1985	116330000.83267689
1986	129069999.96304509
1987	125820000.29087067
1988	152819999.0987779
1989	181040001.33275995
1990	178410000.7414818
1991	209310002.62126336
1992	169390001.3342501
1993	143399999.4695186
1994	117600000.00894068
1995	106670000.86419283
1996	141609997.48110765
1997	186179999.09818166
1998	159540000.60632822
1999	144540000.20772225
2000	93899999.43785371
2001	76229999.91476536
2002	73010000.10780995
2003	90490000.04306439
2004	108590000.74118377
2005	120450000.43511394
2006	134919999.36103812
2007	124589999.34792517
2008	174840000.51021558
2009	162799998.77512455
2010	151009999.9308586
2011	123380000.39011244
2012	130050629.4686347
2013	128080149.12530778
2014	142407418.31064215
2015	126399603.53542124
2016	118739264.59997898
2017	116825201.88391212
2018	110391823.57490066
2019	137756134.8080635