Year	constant 2010 US$
2006	2977.67388413766
2007	3233.75967436359
2008	3255.681082898
2009	3252.25442366454
2010	3333.82215517622
2011	3489.68764915781
2012	3589.60418440803
2013	3648.21270468325
2014	3688.62092775151
2015	3864.79400865586
2016	3980.21023342221
2017	4174.23263528045
2018	4275.91131905142