Year	current US$
2007	15796195880
2008	16911189065.000002
2009	8741499653
2010	7052255634
2011	6421361831
2012	5472474945
2013	4694179888
2014	5102532558
2015	4250872228
2016	3966656452
2017	4404742624
2018	4515414590
2019	4563213722
2020	4419533476
2021	5489674612
2022	4490473203