Year	US Dollars adjusted for inflation)
1970	19601031350.326
1971	21283556246.2655
1972	22310846642.8278
1973	23077110112.4994
1974	23304302372.9267
1975	25512717358.1422
1976	26897537569.4087
1977	29240179372.424
1978	31168861184.8217
1979	31508035527.61959
1980	29980071319.35309
1981	35882647993.8906
1982	39082746853.66511
1983	41197698257.69149
1984	44464558940.09951
1985	45174513258.43751
1986	45217566099.07661
1987	44131362144.00369
1988	45766667379.8909
1989	46077918811.0421
1990	44719281449.4919
1991	39937584070.58279
1992	35312571053.2231
1993	30058702949.6133
1994	30274202820.038
1995	31018100877.8065
1996	33449532253.30049
1997	34380574916.34829
1998	34435290243.3494
1999	36566406095.7142
2000	38729221263.7745
2001	39962758542.8036
2002	40532156423.1685
2003	42069435823.09689
2004	44497068633.1936
2005	49481477439.02849
2006	55451844706.1798
2007	59478833619.18209
2008	61927474920.46101
2009	62826231727.10231
2010	64328000000
2011	66130664082.08839
2012	68124437664.60879
2013	69996226459.61951
2014	70729490571.2058
2015	73868701308.4427