Year	constant 2015 US$
2012	41731138.33297054
2013	40343472.66274573
2014	31728910.922854807
2015	33462939.904819377
2016	44715884.59414097
2017	31210161.425005462
2018	32732227.746659435
2019	25287321.491055008
2020	27126170.94187061
2021	25486482.9593261