Year	current US$
1975	75133132.6695995
1976	75355969.3318729
1977	88935651.7886809
1978	100509659.831694
1979	151196474.47668
1980	151706809.506218
1981	156903719.423657
1982	145129038.370441
1983	158229570.990807
1984	149310103.297014
1985	145397708.103077
1986	157156842.727419
1987	174629284.194322
1988	189297309.959786
1989	249887878.238811
1990	313137161.493642
1991	359050975.635858
1992	342788638.192768
1993	296974016.534932
1994	183136864.154572
1995	195401080.890099
1996	295427024.202241
1997	335533391.71258
1998	215548034.12642
1999	216079372.892005
2000	202550868.436344
2001	180129697.370954
2002	433073474.9287
2003	433252570.490289
2004	391984475.460264
2005	375905673.235421
2006	495913160.825947
2007	618359313.876446
2008	623531998.744687
2009	642557851.734365
2010	689691514.266709
2011	805963907.727989
2012	557880357.357912
2013	527825596.523451
2014	577551224.794408
2015	611908131.57093
2016	517164939.659195
2017	590359610.967139