Year	constant 2015 US$
2007	13917157588.457735
2008	13982761757.532076
2009	13185513797.44619
2010	13227119024.579138
2011	13484765232.055979
2012	13696065192.451128
2013	13638427415.498753
2014	13759715485.980303
2015	13748936919.54244
2016	13773067828.815939
2017	14106862466.992191
2018	14233373958.00728
2019	14508746191.02649