Year	constant 2010 US$
2008	20937724817.9279
2009	20910930479.0778
2010	23066478965.1058
2011	19835724825.5663
2012	24850567100.1247
2013	25789856559.1038
2014	28938136299.2098
2015	32451279709.6087
2016	35008582556.7692
2017	36440883764.1093
2018	39965752838.0283