Year	constant 2015 US$
2011	32577.260790797256
2012	33576.35494535167
2013	38325.48843915081
2014	39320.927452986325
2015	42267.31247004217
2016	44863.59354301265
2017	46078.797665038735
2018	45011.59215693137
2019	47871.415297644104
2020	42230.19010510649
2021	42619.79855271602