Year	current US$
1980	269135802.469136
1981	337025495.750708
1982	411216931.216931
1983	375422885.572139
1984	394433962.264151
1985	154050925.925926
1986	368675742.574257
1987	400533539.731682
1988	448574723.598933
1989	486101221.640489
1990	554360886.879776
1991	362121743.965658
1992	316782701.893966
1993	337273064.603958
1994	393370566.581287
1995	493431578.161386
1996	533736107.426003
1997	638494405.929135
1998	645552755.065531
1999	738270823.146731
2000	1086006721.10042
2001	662561515.312158
2002	1024658945.52884
2003	846219426.993415
2004	865119490.022474
2005	1001185040.34423
2006	1019786688.82757
2007	1055551505.90841
2008	1744219728.6281
2009	1538607376.72749
2010	1813865527.11859
2011	2828979903.74162
2012	5362328402.0019
2013	6304503580.90758
2014	7301989740.91546
2015	4729305399.23717
2016	2449713261.74111
2017	3111678855.86536
2018	3712244339.34584