Year	current US$
2006	5811142034
2007	8824769500
2008	10972798838
2009	8343788122
2010	9793433535
2011	11770731385
2012	11343854001
2013	14714071391
2014	14805630189
2015	13354664121
2016	14872357797
2017	16598037475.000002
2018	18324240414
2019	18942103893
2020	19500824278