Year	constant 2010 US$
2006	17355237895.3071
2007	18213587729.3966
2008	19081244667.1633
2009	18452690458.4547
2010	18530631814.1803
2011	18467619692.5577
2012	18423493600.5959
2013	18422836053.3622
2014	18762538091.6909
2015	19029032978.9395
2016	19370548520.3494
2017	19672701970.6101
2018	19918697094.8737