Year	constant 2015 US$
2006	18733346.675632134
2007	19167292.124603085
2008	15912607.975840071
2009	20155143.00693378
2010	17872638.451716613
2011	23595364.02113171
2012	34640637.60706306
2013	44690970.91811819
2014	44195179.8473356
2015	72808900.97589193
2016	61266636.157590136
2017	53201909.567601934
2018	40302685.04722431
2019	35388041.15843976
2020	34078904.33329862
2021	45256629.0964623