Year	US Dollars adjusted for inflation)
1980	7624221103.47913
1981	7218864341.89657
1982	6673391235.87742
1983	7098911806.39139
1984	7454116226.23047
1985	7099429359.04756
1986	7183415176.43469
1987	7930419191.02771
1988	8485547872.1663
1989	8516435872.13312
1990	8894395055.67055
1991	9893235511.91183
1992	10555092806.0632
1993	11913533954.1921
1994	11883749942.4451
1995	12350780310.4502
1996	12858398136.4749
1997	13256108363.4132
1998	13891076323.6746
1999	14488392461.1778
2000	15256276507.3657
2001	15636315475.986
2002	16201435104.2376
2003	17177401647.9676
2004	18376546950.2211
2005	19620444333.8462
2006	20889606053.0421
2007	22621864899.6304
2008	24034629395.82701
2009	24645054296.3673
2010	25713271276.5957
2011	26223377131.9619
2012	27202099523.9053
2013	28675502255.2549
2014	29922841390.63931
2015	30779223483.58979
2016	31769062885.3112
2017	33003237140.6953