Year	current US$
2005	12738587257.232653
2006	18544755643.414135
2007	24407810130.474945
2008	31116242968.619274
2009	24502342303.79816
2010	28960934210.667713
2011	31917254549.656273
2012	29588811976.74591
2013	28760012693.683575
2014	29579044673.769653
2015	29401926000.444725
2016	22749442505.748493
2017	28230462732.73431
2018	34389991449.26728
2019	37965612630.19995