Year	constant 2015 US$
2006	3992.13345018663
2007	4482.775989653183
2008	4589.877408002228
2009	4713.763597541187
2010	5303.073104244186
2011	5584.207447292642
2012	5680.260798000634
2013	5742.367512136883
2014	5634.7630786610725
2015	5330.956676664677
2016	5274.7065905665795
2017	5201.600525340547
2018	5297.05546739454
2019	5271.976194622685
2020	5200.971696994217
2021	5335.355905038628
2022	5396.096653828954