Year	current US$
1985	56151776.33772871
1986	53997911.02979799
1987	63181918.11789571
1988	52452010.3992305
1989	47609243.697478905
1990	59377391.95597181
1991	67355660.83343178
1992	61668917.66467999
1993	53917126.6166901
1994	58572206.006035805
1995	61944085.7631903
1996	28978023.429930337
1997	28259901.94432158
1998	34451266.379934534
1999	17632294.55472994
2000	35537321.578893825
2001	31452995.913386323
2002	34377253.44905851
2003	38123164.175795734
2004	74901989.281497
2005	124679314.75994208
2006	193478645.03088802
2007	172845586.69569725
2008	240502913.5616449
2009	160109604.63076118
2010	156487069.52003542
2011	189476292.6818955
2012	191131317.0789197
2013	225082479.104919
2014	249475859.6427524
2015	205258306.3932612
2016	181180169.5447908
2017	214601411.49140072
2018	215883668.35483268