Year	current US$
1981	15802169427.1076
1982	16658974026.6455
1983	14919923328.2405
1984	14684557330.5267
1985	14378722804.4997
1986	16170749885.9978
1987	17858932939.5796
1988	20735731897.6211
1989	20618547049.2407
1990	20149953596.4472
1991	20541535826.4139
1992	20551671576.8734
1993	19385292985.793
1994	16952424895.1591
1995	18040672276.7549
1996	20014824368.1026
1997	18435316169.2859
1998	17731942164.5438
1999	17401491723.1631
2000	17106176374.6972
2001	15927260222.1456
2002	16553668344.1579
2003	18010481548.2578
2004	25180327887.353
2005	27762526333.1021
2006	38905484624.3791
2007	56953125277.2279
2008	68026063195.2247
2009	63702388805.5381
2010	75494707497.7091
2011	82852064178.4509
2012	92508250201.3301
2013	96131078995.7128
2014	99192881422.9083
2015	99223326023.8993
2016	90142804023.3047
2017	85608071724.6241