Year	current US$
1981	77427538305.1047
1982	80754568184.3399
1983	80393245718.6911
1984	87104446032.8193
1985	97093783738.4231
1986	87598413426.0191
1987	91478058409.9985
1988	101220583422.134
1989	89915385374.0118
1990	94298607614.1307
1991	98191269044.3081
1992	101707461742.687
1993	100781240565.013
1994	100001802581.625
1995	115428194450.126
1996	132347477882.934
1997	136381610789.198
1998	134899017012.569
1999	136020665585.716
2000	136935650575.981
2001	152220158634.11
2002	169947580787.878
2003	189519996965.963
2004	225675665795.202
2005	270586511437.863
2006	327928820764.168
2007	434908780794.328
2008	501743826971.158
2009	494657925263.369
2010	572367354715.888
2011	657605089701.744
2012	695212513178.062
2013	823276082180.431
2014	891275916258.424
2015	887985839665.364
2016	830072451927.446
2017	816807772706.211