Year	US Dollars adjusted for inflation)
1974	7076283755.04218
1975	7101437330.39971
1976	8532760029.33627
1977	9464255592.2259
1978	10105537880.4547
1979	12385592665.9333
1980	11519009534.2868
1981	9235168243.49102
1982	9600571983.86506
1983	9648715584.89183
1984	9706595966.2633
1985	9561894976.16429
1986	9302244591.12579
1987	9489138760.54273
1988	9593269453.61204
1989	9490220608.72755
1990	9593609020.9021
1991	9895418335.16685
1992	10366299816.6483
1993	10397872753.9421
1994	10724927172.7173
1995	11205265273.194
1996	11527788412.1746
1997	11358194866.1533
1998	11294758342.5009
1999	11639492115.8783
2000	11971150348.3682
2001	12299643564.3564
2002	12775897689.769
2003	13146904070.407
2004	13213206307.2974
2005	13264408434.1768
2006	13847739933.9934
2007	13869146021.2688
2008	13600124165.7499
2009	13360145141.1808
2010	13707370737.0737
2011	14220755408.8742
2012	14350568390.1724
2013	14045471213.788
2014	13715438210.4877
2015	13637697103.0436
2016	13301457674.8771
2017	13478200979.2483