Year	current US$
2011	10068116196.163107
2012	14160167981.224619
2013	15364847428.246593
2014	17976452550.096546
2015	20821719370.852337
2016	20588861390.188915
2017	22140677251.094246
2018	21746302685.711422
2019	22011340541.293987