Year	current US$
2007	16618380809
2008	20127504748
2009	17057585747.000002
2010	20394443390
2011	26849987689
2012	25441407832
2013	24673076911
2014	26887411371
2015	24757970785
2016	24689661232
2017	29448209320
2018	36023128341
2019	37656863124
2020	39603323141
2021	41415752357
2022	45217937911