Year	current US$
2002	256782352.46940887
2003	327951916.29831815
2004	378219475.43048704
2005	254377741.332987
2006	295660463.434945
2007	354991756.87497896
2008	389169337.79657096
2009	346098920.214892
2010	408824662.84843004
2011	403696266.711563
2012	386905076.557657
2013	418391837.2754071
2014	402633267.70762503
2015	365918889.33019495
2016	345340468.2471731