Year	current US$
1990	238051661.127985
1991	193298986.859551
1992	228312983.774246
1993	217944634.083625
1994	269065923.070096
1995	115548493.611609
1996	160805557.70903
1997	145249012.949482
1998	194766935.014519
1999	137561418.014842
2000	134286210.701665
2001	93657352.8830607
2002	126806673.59451
2003	209972319.141187
2004	71713606.9592544
2005	-69505799.4151295
2006	79793355.9457514
2007	325201219.876695
2008	61162383.1256253
2009	-25420329.4012345
2010	18996435.1462182
2011	-236194362.184864
2012	-136203955.477202
2013	-42407937.3894286
2014	-52450422.1764133
2015	-70429071.3497624
2016	-220313098.822233
2017	-118781456.260477