Year	constant 2010 US$
2006	16213.1877442284
2007	16537.2058754483
2008	15941.2559656999
2009	15812.0559815276
2010	16751.4121265028
2011	17330.9778931064
2012	17918.6636850993
2013	18184.7204090186
2014	19029.9294148046
2015	19828.3445950902
2016	19739.9149426038
2017	18561.5158801102
2018	20013.3982291435