Year	US Dollars adjusted for inflation)
1980	5639605626.23213
1981	5963636797.42292
1982	6139480401.28891
1983	6207317869.32012
1984	6129627287.14195
1985	6238774125.18701
1986	6590468993.96566
1987	6538546468.0658
1988	6445696515.37026
1989	7079730609.59294
1990	6401801081.44935
1991	4507572306.61807
1992	4183027101.16522
1993	4584597704.7764
1994	4965119313.34799
1995	5625480181.64411
1996	6137398878.60781
1997	5472236442.22248
1998	5965222153.93997
1999	6770597139.17318
2000	7221967155.94539
2001	7795415283.49943
2002	8125268226.5056
2003	8594379820.60265
2004	9085080800.55321
2005	9604821915.17285
2006	10126461016.8989
2007	10723922216.8765
2008	11127233240.5581
2009	11500286001.8886
2010	11926953258.916
2011	12231109752.6888
2012	12404787541.0993
2013	12528929022.9843
2014	12751238423.4304
2015	13034156787.8592
2016	13471082475.1768
2017	13988555742.8063