Year	current US$
1995	184523708.39238697
1996	211587185.62327042
1997	236549718.75860006
1998	242493179.02891663
1999	208021109.46108043
2000	311437318.164589
2001	267455712.1642463
2002	276965248.5967528
2003	322135546.65115887
2004	434340062.9004389
2005	501904072.68495154
2006	398145057.6587356
2007	423481561.3279279
2008	371602053.81481993
2009	340233049.27201045
2010	347472050.32035106
2011	296799042.9819665
2012	494665071.63661087
2013	471741568.31686544
2014	591185085.6144861
2015	532870910.5028531
2016	474556735.39122015
2017	601550791.3409834
2018	653907989.8465875