Year	constant 2015 US$
2010	21793923972.532646
2011	23427718294.265587
2012	26618770904.29812
2013	28377945863.715836
2014	28145645541.13422
2015	27720274420.64537
2016	27894499662.58158
2017	28459481738.529247
2018	30242295563.388744
2019	32567761403.386158