Year	US Dollars adjusted for inflation)
1980	28567896236.6319
1981	29967769392.17549
1982	30667386625.15231
1983	31719371801.81401
1984	32796702382.564
1985	33676782455.6654
1986	35093767429.2676
1987	37218524434.81791
1988	41291977325.0305
1989	39933519967.5105
1990	36292630364.15329
1991	33227588804.6568
1992	30811149654.799
1993	30355078448.626
1994	30906937186.95009
1995	31790934141.0586
1996	32014958711.2495
1997	31666373358.603
1998	32762894273.72409
1999	30793894679.843
2000	32315283606.33549
2001	33533640178.6923
2002	35524705563.8283
2003	37356436983.89059
2004	39760457560.5794
2005	42592798158.9278
2006	45520779748.2063
2007	48864017869.22969
2008	51806552050.90019
2009	49948693651.00851
2010	50610058210.3696
2011	51579193177.2032
2012	51595167185.59629
2013	52040002707.45909
2014	52731487748.7478
2015	54639028022.20121
2016	56792405577.36559
2017	58815148233.383