Year	current US$
1981	52720427775.5411
1982	56261220538.7721
1983	57199712193.3337
1984	64413644905.2483
1985	73477800629.941
1986	72202380180.913
1987	78972717479.0517
1988	81862293192.776
1989	85895480173.4878
1990	110358980885.064
1991	110424377596.696
1992	108085528107.652
1993	99207327427.9604
1994	95855328138.9055
1995	115638501274.071
1996	128040077739.34
1997	133085296769.294
1998	143870122613.786
1999	138832960532.54
2000	145341893549.158
2001	155581723860.035
2002	188548762191.334
2003	212878454538.669
2004	245708091810.681
2005	298087273605.966
2006	344865649522.204
2007	459750959524.898
2008	533211954742.597
2009	557457363763.731
2010	626833045015.983
2011	701895146008.933
2012	755432332660.316
2013	923375543228.83
2014	1001699876907.51
2015	948031821757.301
2016	892145810077.196
2017	917496972914.954