Year	current US$
1970	4930000.031366944
1971	6960000.088438392
1972	15300000.013783578
1973	14759999.804198738
1974	13600000.130012633
1975	16410000.048577778
1976	27980000.264942653
1977	47419999.91983175
1978	64250000.81583859
1979	85129998.14748761
1980	93539999.69363211
1981	71790000.18909574
1982	71930000.58829783
1983	76439998.47024675
1984	75919999.8062104
1985	65449999.60623677
1986	111649998.67975716
1987	141409999.9144674
1988	169589998.56188884
1989	160469999.7249991
1990	208160000.750795
1991	146180000.10587275
1992	169549996.4915216
1993	135829999.2438406
1994	133730000.45120719
1995	171999997.71825966
1996	183599997.62848023
1997	164950001.9773841
1998	188109999.47972587
1999	114799999.49783093
2000	139539999.5800108
2001	312329999.0072849
2002	247309998.59049928
2003	271299998.4771014
2004	365360000.0441077
2005	506060009.0902297
2006	541870000.2916158
2007	763559994.1685796
2008	423770007.99402577
2009	391050007.39544624
2010	332430000.58829784
2011	270639997.5270032
2012	178229999.937117
2013	174209999.37132
2014	157060003.04222107
2015	107050000.47571947
2016	116989998.68333328
2017	123379999.0843982
2018	124729999.57762668
2019	133470000.8127837