Year	current US$
2005	6634718323.945735
2006	7443858160.923292
2007	9590320571.866703
2008	12267553086.833572
2009	10667096711.056149
2010	12328114746.959406
2011	16317041571.04576
2012	18673348179.302944
2013	23752384885.65428
2014	23429728645.992283
2015	18295567295.01313
2016	17630420973.11034
2017	21138612933.845356
2018	25209854288.653103
2019	25106746500.151455